I almost always wholeheartedly agree with Lenin....except this time!
I don't think you're eating near enough. First of all - at 5'7" 115 lbs. is very thin. That puts you at like an 18 BMI - underweight. To be eating like this and exercising like this when you are ALREADY underweight is a dangerous line to walk.
Are you eating this way out of conveneince? (i.e. graba cereal bar and eat it as you walk to class) Or are you eating this way because you WANT to be really thin? I think that's a question you should ask yourself.
I definintely see why there is concern for you. It's a slippery slope to walk. I would strongly suggest getting more "real" food (as I call it) in your diet. The fruit bowls you mention I am guessing are prepackaged fruit in syrup or water? I'd skip those in favor of more fresh fruit. Add chicken breasts, tofu, or other lean proteins, etc. I know it's tough when you're in college, but we've all been there and these days there are plenty of ways to adjust in this setting.
Aside from the weight issues - you want your mind functioning at it's highest capacity for your studies as well. You can't do this without some essential fats in your diet.
Good luck to you!