So heres the thing about exclusion...?

I don't care if i'm pretty or popular but i do care about school and how people treat me. Recently theres been some problems were i was invloved and after that people started talking behind my back, ignoring me, constantly excluding me, and i can't seem to stop crying. My best friend and my crush keep secrets from me and she excludes me. I mean like a best friend doesn't do that. I'm tired of it and don't know where to find help. I told my mom but she doesn't understand the situation and i really want GOOD friends who DON"T ignore me... What should i do? :(