I'm in college also. I ride a lot really. Everyday for about 3 hours!! I have a job and stuff too. I have like a class that ends at 10 am and then I don't have class till about 1 and I can ride in that time. I consider it my physical part of my day. I even have a lawn business. Its all about properly budgeting your time. Do your school work (I promise its really really easy and you learn a lot), DO NOT join a frat because you shouldn't have to pay to have friends, and just relax. Do your own thing. I budget my time so that on Sunday, which is my full day off, I can go to a skatepark for the whole day. Its much more riding than in high school!! You can ride during the day and stuff. Oh and don't take more than 16 credit hours or you won't be able to lol
References: OneGuyIlluminatiEye, robinson79, Brian Griffin, The Horror Contact, StoreBoughtChild, C_Johnsonbmx, dkTechEthan, etc.