Can you help me with this girl?

I'm in high school as a sophomore she is in the same grade as me, but a year older, because she moved here from another country about 7 years ago. We met last year in science class and I have been in love with her ever since. We used to talk mostly on Facebook, but now we are in an English class together and we talk all the time in person there, she sits next to me everyday. She has had a boyfriend whom I strongly dislike for the last 8 months or so and have broken up on numerous accounts because they go to different schools and never see each other because her family is very controlling. Every time they say something on each others walls on Facebook it just say "No your cuter!" "Noooo yourrr cuter!!!" Stuff like that. Plus he is the type of person that hits on so many girls, and she is kind of oblivious to that. I just don't want her to get hurt by him :(. The only thing he has on me is looks. I always let her use my cell phone for games and texting in class and sometime let her take it for the day, the last couple times, she told me that she loves me. Also the other day she "forced" me to let her and her sister give me a ride home from school, I don't know why, but I went anyway. Also last week she asked me "if I asked you to Sadies would you go with me?" I said I guess so, but you have a boyfriend, so it doesn't matter, but yea. Then yesterday, she asked if I would go to Prom if I didn't have a date, and I said no probably not. I don't know why she is asking or saying these things. Today, we didn't really talk about anything special, but we played solitaire together on my phone. What should I do next? I still reallllly like her and want her to like me more. I need advice on what to do? Does she like me? I need help. Thanks so much and please give me a lot of advice.

Plus I have known her for 6 months or so longer than her boyfriend.