I didn't just start school...in fact I graduated over two years ago(and I'm 27)...but you have plenty to be happy about. You have an unlimited supply of something at the start of this,your college career...potential. You don't really need to know exactly what you want to do, but you can use the people you meet and the influences I'm sure you'll encounter to decide that down the road. College life is great...and that's coming from someone who didn't fully appreciate at the time. Go out and meet new people, try new things...you won't regret it. If you have other things that are bringing you down, that's understandable, but just the fact that you are in a new, different place shouldn't bring you down. Life has it's peaks and valleys....hell,I'm unemployed, I have a degree, and I still have yet to decide exactly what I want to do or where I want to end up, but I know that I will find my "purpose". Pop "All That You Can't Leave Behind "in the stereo...it sometimes lightens my mood a bit. Good luck, and....
Walk On!