I think it’s a misunderstanding and nothing actually happened 
But I have a haunch this purple bitch will lie to him 
But even if smthng happend purple girl wasn’t drunk but he was extremely drunk and he thought that she was his girl 
So isn’t this rapeee??? Like literally and anyone says otherwise is fucked  in the head 
But I still think he should tell his girl to avoid any future problems ,it will keep piling up with his guilt and shii also with his lying he shouldn’t