A lot of time in college, you have medical insurance through the college health plan, and there are counselling services at the schools (been there, done that)- and they are real therapists, not volunteers.
Some things I was told during bulimia recovery:
Throw out anything "diet", (drinks, 'lean' dinners, liquid meal replacements, etc). Focus on healthy foods in healthy amounts- don't clobber yourself if you eat a little too much once in a while- that's called normal.
Stop purging. It will be hard at first- but if you don't have the payoff of the purge, the binges start to decrease, and then disappear. It worked !! It was uncomfortable at first, but not as bad as the life I was leading destroying myself.
You didn't consciously decide to become hooked on bulimia- so please, don't throw guilt on yourself for that. None of us wanted things to become out of hand. Treat yourself how you would treat someone else if you have to, to get through the hard times. Chances are, it's better than you'd treat yourself.
Get a check up from the college health center docs, who can order lab work and anything else, to be sure you don't need special vitamins or something. The college health centers are great resources and my first contact with recovery from anorexia and bulimia when I was 26 years younger than I am now. I've been symptom free for 11 years, but have permanent medical issues from anorexia, bulimia, compulsive eating, and restricting/purging. It's good you want help now.
The lousy times don't last forever- remember that