Mr.Arrogrant Alpha loves me? Really? Why reject me then?

I'm Skylar and this is my story of how I got my mate which I dont even know how.....
It started about three weeks after school started walking around school ... ok you get the picture I bump into my mate but dont know who the hell he is until i walk into class and find out he's my sisters boyfriend their both popular and well I'm however not popular ... Im known but just not popular .... Tara is my twin sister we love/hate each other and everyone knows not to mess with us cause things get hectic when you do .... As I was saying I found my mate and he so happens to be against having mates but he so happens to "like" me but i dont know..... I'm scared he'll reject me but then he just confuses me cause he says he wants me but doesnt, then he says he cant cause it'll put me endanger so he ends it with Tara and distants himself from.