I feel upset and hurt !?

please help. my best friend has an obessive boyfriend and hes trying to control her now its startin to affect our friendship. he tells her she cant go out anywhere and shes not allowed to have friends. i invited her to my parents wedding and she promised she would come but her boyfriend told her shes not allowed to and he broke up with her because she told him she is goin to the wedding, now shes unhappy and shes makin me feel that its all my fault / the wedding is next week , i dont think shes going to come and choose him . i feel really upset