Good luck with everything but let me tell you something ; learn to excel anything you do, there's always a way to stand-out and to learn to enjoy and have passion for new things.

I notice you mention that this is taking a lot out of you, as in 24/7.  Are you cutting it or are you spinning your wheels, such as in design, causing it to take 24/7?  Or are you just a perfectionist?  If you are a typical university student, between the ages of 17 and 23, then that resentment that it is robbing your of recreational pursuits, a social life, and other university experiences is both understood and common.  And don't kid yourself, those who are bucking for high grades to get into medical school are at it 24/7 as well.

If you were a grad student who returned to the university setting after a time gap to work, you might not care that it takes 24/7, because you've done college before and are not there to socialize or do those kinds of things which involve being overly involved with the university community.  Personally, I didn't care that this was the case.  It's not like returning grad students have much in common with undergraduates and anything beyond their academic unit anyway.

When you get to the work world, it will not be as grueling, in terms of hours, as was a-school.  I have not experienced this and neither have my friends.  The most I have ever worked in one week was 62 hours, and I'd say 45 hours is about average when things are humming along.  This means there is time for restaurants, bars, movies, concerts, exercise, travel, and the like.  There are sweat shops among architectural firms who dangle the carrot of having their names on your resume or allowing you to name drop that you've been within 5 feet of a certain name architect.  If you are content to do decent design, with no intention of fame and footlights, these firms can be avoided, and you can have a more conventional life working for a more conventional firm.

What you're going through is quite typical for a first year (or any year) design student. I think design school in particular makes you somewhat existential since you are always criticizing and analyzing your context in a pragmatic and aestheticized way. It also makes you use the word "aestheticized."

One thing to know is that many design schools, especially in the States, give you a FALSE impression of reality. You do NOT need to spend nights on end in the studio; you CAN have a social life AND be a great design student. The issue is that we are given this false impression of fetishizing our designs, yet you will soon see that in many design crits at midterm and finals we are criticized on the resolution of the "big idea" and how it is realistically implemented in your design. You will often hear colleagues say after a final review, "What the fuck, they didn't even talk about the materiality of my project," or "The jurors didn't even give a shit about my renderings," etc. My point of saying all of this is so you can learn how to be an astute designer; great designers can think and execute fast, yet they can also convey a great deal of care to their craft. You need to balance these two elements as a designer, and the earlier the better. I remember in college, we had the students who were very resolute thinkers, thus they had their designs resolved at a very reasonable time within the semester, meaning they always had free time to do what ever they wanted. You also have the one-liner student (designer); theres a VERY FINE line between being a one-liner designer and a very resolved and clear designer, and the biggest way to tell if you're being too much of a "one-liner" is if you're not taking enough risk or challenging yourself.

FINALLY. If you notice, I refrained from saying "Architect" or "Interior Design". A good designer is a good designer, period, full stop. Any architect or any other person in a design profession who scoffs at another design profession – fuck them. I've worked at a famous architecture firm, and the one thing I appreciated was that there was an appreciation of design as a whole, we appreciated the design of the landscaping to the interiors (bathtubs, faucets tiles). "Just look at an Agape / Alape catalogue and tell me you won't smile (ironically on a designer salary, we could never afford those appliances...).That being said, if you like design – STICK to design, there are so many venues to traverse in the design profession.  You will soon realize that the design profession is NOT black and white, unless you want to view design in that fashion, then be an engineer. 

Apologies for the long rant and any typos. 

I have always wanted to be an architect since i was very young.

Then do what it takes to be an architect - never give up - try and remember when, where and what you were doing the day you decided to be an architect - works every time - 

The OP should note that ANY kind of professional education has these features to weed people out.  They want those who are not committed to leave, unless we are talking law or med school at a prestigious university which then seek retention because dropping out is a black eye for them that they didn't select their incoming class correctly.

I might have implied 24/7, but I still found time every now and then to take in a movie, take a drive somewhere, go out for a decent dinner, hang out with a few people I liked, and even worked out fairly regularly.  You just have to seize those windows of time.  Do you block time, as in planning your week?  That might help alleviate some stress.  I couldn't function if I didn't do that.

Unless you have, with all of your heart, identified something else you positively want to do, then my advice is to stay put and put less pressure on yourself, while still doing well.  It can be done.

Your'e 18, I was studying architecture in high school and gave it up and decided to go into graphic design - a few years later, Funny thing, It was on field trip to SOM to visit their graphic design dept. that I realized my mistake. It took 30 long years of working as a 3D modeler in flight simulation, video games, then architecture school, then after graduation, I was working at SOM doing architecture production and BIM modeling.

IOW don't give up - 

Dear all, I'm really grateful for your response. You gave me hope, I won't give up, work hard and hope for the best. Thank you... :)

I feel like I know where you're coming from as around that age, I remember having many doubts in my life. As long as you have a goal in life, then you're good. The only thing you need to worry now is making it through. Trust me, It's okay to have a limited social life. You should accept the fact that you have sacrifice time for what's the most important like, your grades. I won't speak for everybody but for me, grades were everything. You'll reap what you will sow so I graduated with honors which helped me rise among the pack. 

But remember don't forget to go out once in a while. It will help you refocus. Or else you'll be burned out. Remember to keep looking at the light at the end of the tunnel. You have all the time in the world to socialize after College, so make the most of your time there. 

After college I remember talking to my fellow students about some stuff they did during those times that were just about drinking, socializing etc. I have no idea what they were talking about or how they found time doing those things. But then again, I don't care because I have achieved something they didn't, and you have to know your priorities. Come to think of it, why would I regret having not to go out so much when most of those things were unproductive and irrelevant. You can have fun and do what needs to be done at the same time. It's all about what you make of it. (sorry for the rant!) lol

I hope this helps.

@yEAh, thank you for your comment,i see myself in your post and I agree with everything you say especially "I have no idea what they were talking about or how they found time doing those things", same here :) I agree, priorities are really important and I will consider your recommendations. Thank you...