Does this girl like me and if so does her boyfriend no it and is scared.?

we have known each other since 3rd and now were both seniors in high school. for the past three years i have noticed this signs but cant seemed to make sense of it. every time i see her rather its in the halls, football games, etc. she will look over at me and stare at me for several seconds. the only thing is that a lot of times she with her boyfriend who happens to be the star qb. i sent her a few emails askin how shes been but she would never answer back. i also sent her friend request on fb after making myself one but she decline them. after awhile she claim that i wouldnt leave her alone and block me. but after seeing her bf slap her hand lightly because she was lookin over in my direction instead of listenin to wat he was sayin.im starting think that he made do all that. please help i have a lot of respect for her and would just like to know seeing how her bf going to college next year