My best friend's boyfriend hates me??

I'm not exactly sure why... we used to get along really well and all of a sudden he's called me homely, told his parents I was drunk... and I don't drink, he makes me feel guilty when I don't want to come out at 11 o clock at night, he pretty much treats me like a dog and he also made fun of me being a christian... I'm not sure if he's just an assh*le or if I did something but my friend doesn't even stand up for me she just sits there... and I don't no how to confront her about this whole ordeal she acts like were best friends but then talks behind my back with him and tells him everything that I tell her even if its private I need help!
My best friend's boyfriend hates me??
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