Good luck with everything! I looove soccer too but it really is hard on the knees/joints, etc. Now this might not be up your alley - but give yoga a try. Ashtanga yoga is very vigorous and it's a great workout but also gets you mentally clear.
I know how you feel about the college dining hall thing...right now I'm living at home but I'm starting at NYU in the fall and I'm nervous about keeping up Primal in college.
Question: what have you been eating on a daily basis in your first week and a half? I'd love to lose 7 lbs in a week, haha. But of course I'm 5'1 and 117-8 lbs (I'm a girl) so losing 7 lbs is a hell of a lot more than for someone with a 5'10 frame!
Good luck with everything