Going to chime in as an old man here:

Don't spend all of your time in college only playing Magic. More likely than not, right after your time at college for a significant number of people, your world is going to drastically shrink unless you proactively go to meet up with lots of different groups of people.

If you went to a normal suburban High School, you probably had classes and interaction with a minimum of 30-some people, with the very real possibility of more than 200 people (6 30 people classes, plus whomever you meet at lunch and extra ciriculars). College has similar numbers of people, plus lots of groups, societies and such that are almost always actively looking for people, and the energy needed to break inertia and try all sorts of things is SO much lower than after you've left that scene.

It's not impossible to meet new people and do new things after you've graduated, but if you end up with a full time job with that shiny new degree, there's going to be a whole new degree of difficult added to it... while Magic is an almost trivial thing to jump back into as most local game stores have very work friendly schedules.

Also, try to be reasonable. I went to a prerelease event for HOU at my local shop, and was chatting with people between rounds... one of the people mentioned how they just failed out of a middle tier university and now were attended the local community college because they were just playing Magic all the time.

Try to balance your life. Go do new stuff, learn new things, and don't be the idiot who fails out of school because they wanted to play a few more rounds of EDH or test out their new brew for the local PPTQ instead of going to class.