When I first got my betta, he was very picky about food, and wouldn't eat. I fasted him for two days, and then started feeding him some WalMart-bought betta food. I did notice that he would try to eat them, but they were really big and he couldn't! I broke them into 1/2 pieces with my thumbnail and fed them, and then invested in some good New Life Spectrum pellets, which are much smaller, and he loved them
If you think the pieces are too big, try making them smaller and seeing if your fish is just picky. If she is just picky, try fasting her a little while, and then she'll probably eat just fine. Most people say flakes aren't as good, but some fish may like them. I can't see a picture of her, so I'd just like to make sure you have a heater for her. What size tank is she in?
Also, in regard to bringing her to a dorm (assuming you'll be living in one). First, make sure whatever size tank you have is allowed in your dorm. You should be fine, but some dorms are picky about the size. Next, talk to your roommate about your betta. You may want to let them know what is normal in a betta, so they don't think something is wrong with it and try to "help" it, in whatever way that could be. Maybe just make a rule in regard to other people not being able to touch your betta-goods, not feeding your fish unless you say they may, or ask them to, etc?
As you get to know your roommate better (if you don't already), they may be able to feed it for you if you go home for a weekend, etc, so that's always helpful.
In regard to moving your betta TO college, what I have done is kept my betta in his 1.5 gallon tank, but only had about 1/3 the water in it, with no plants, rocks, etc. If you are driving, place the bowl/tank in a box lined with towels so it can't move at all. If you're not driving, I would just keep the bowl/tank on your lap (depending on the size). When I move in to college this semester, I plan on using a very small bowl to transport him (about 1/3 of a gallon) just so he has less room to sploosh around in. Hope that helped!