I know EXACTLY how you are feeling right now. I am 25, and still working on my prereqs. I used to check out Facebook to see how my high school friends are doing, and it was definitely discouraging because they had gone to college right after high school, and I just partied. That was unnecessary torture haha. I just put them from my mind and concentrated on doing my own thing. Finish at your own pace - at least you're going to school and not just hanging out. You will get there before you know it.