I agree with most of the recent posters.
College is what you make it. I understand wanting to go to a specific school, but even so far, you had to change to a different programs of study (although a computer science degree is probably better to get then a IT degree... more versatile it would seem) just to go to that particular school.
You say you have friends that go there or will go there. Honestly, once you go to college there is a darn good chance a majority of your group of friends will change, OR if they are still your friends, you may still only see them on breaks anyway because of your different time commitments and living quarters. I went to the University of Illinois (a GREAT comp sci and engineering school btw ... 5th or 6th i believe) and almost 50 people i knew ended up going there too.
I talk to about 3 people still, and of those, I never really see them at school. I got new friends, met new people, and had new experiences. Not that those original friends were any less important, but we sorta grew apart.. I see them at breaks at home, when we are away from our new college commitments. You will make new friends and find new things to like.... and chances are make friends that share more interests and similar drives in life as you will be surrounded by SO many more people and ideas and challenges, so that really shouldn't be very high in your priorities when trying to figure out where you want to spend the next 4+ years of your life.
You'll learn a new area pretty quickly too btw. You may find it nice to have to explore a bit more, and make friends just by getting lost or turned around and experiencing new things together. If you stay in the NY area with your other schools you are plenty close to go home a decent amount as well if you ever feel homesick or want some normalcy. That's always a nice option.
Anyway... If I were you, i'd really take some more time out and tour the colleges (again ... assuming you already have, if you haven't, then you really gotta get on that) and talk to your prospective professors and maybe even some students and see what it's like. Sit in on a class if you can. You may find one of the many other schools you got accepted to is a much better fit for you.
Other then that, I think you need to try to turn your attitude around. If you go into something, like going to college, thinking you are going to hate it and not want to be there, and keep thinking about "if only i got in at NYU" you ARE going to have a bad time. Period. Try to be optimistic and see that there is plenty going on out there, and plenty of good things.
Stop being so negative about something that hasn't already happened. Life is not going to treat you well, nor will you be happy, if you go through life so jaded and negative. God, you are a highschool senior, you should be plucky and happy and enjoying life pretty well right now.
B E POSITIVE!
and BTW... NYU is not a name that will help you get a job in the computer science/ tech field. So i'd throw that reasoning out the window.
It's pretty much like any other state/city school in that field anyway. UIUC would be better, Purdue of Indiana would also be superior in the name department... but really in CS, that doesn't help much at all anyway outside of carnegie melon or the MIT - like ones