This was my experience with a similar dilemma.
Turned 21 in 2000, started trading prop. Made about the same as you 1st year. It was tough, though. trading stock market 8:30-3:00 then busting over to class from 3:30-6:30 every day, trying to listen while my non-risk-control-understanding-brain was fried, but managed to balance trading/school/friends. I'd tell my profs what I did, and they told me how much they lost in AMZN & CSCO (that was a real motivator to go to class) Then I got a girlfriend. Decided one of the things on my plate had to go, and it was school. Year 2 was not as much fun, edge wasn't working and had bills to pay (moved into nicer pad, etc..), and that lack of risk control always seemed to crop up at the worst times.
After year of that, I realized that I should probably go back to school. I'd given trading a shot, it didn't work out, no big deal. Swallowed my pride, got a part-time job on the weekends and paid my way through the next two years of school. Which included studying abroad and traveling in Asia for my last semester, which was probably the best decision I ever made in my life.
Did some more traveling, and figured, why not give trading another shot? I had 3 years to reflect on my mistakes and read the market wizards series (ahah! risk control!).
Been trading full-time for 2.5 years and doing pretty well.
One of the reasons I went back to school was I felt it made a better risk/reward. With a degree, I could take more risk careerwise. If trading didn't work out, I knew I could still get a finance gig somewhere. But if I blew out trading at 28, AND THEN had to go back to school, that would be tough. Not impossible, but not what I wanted to do.
Whatever you do, pick one and do only that. Trading is a full-time job. School should be as well. If you want to trade, you won't be able to compete if you've got finals week during earnings season. And if you want to go to school, bust ass, and take advantage of all your college has to offer. Girls, interesting classes, intramurals, study abroad(learning 2nd language), girls, etc...