If what you're doing isn't working, change something - whether it be your diet, exercise routine, or both.
Try lifting heavier weights and doing drop sets. Reduce your cardio, too - Grammaton's right on w/ that.
I assume you have a fridge and microwave in your dorm room? Get some oatmeal (not the kind that comes in packets - it's full of sugar), natural PB, 100% whole wheat bread, fruits, etc. It's crucial to have a good diet for weightloss and busting through a plateau.
When I was at UCONN, I worked in the dining halls for my work-study. The chefs were great (even in the super-large dining halls) and were very willing to make things on request. For example, during Lent (I give up meat), the chef would save fish for me and bake some everyday for me to eat. Another girl was crazy about her veggie-burgers, and another chef would gladly grill her one when she came in. Just go in the kitchen at a slow time during the day and talk to the chef. They're there to feed you and will accomodate different needs.