Do you think it's likely my friend was abused as a child?

She was either molested by a man that she trusted or she was d at some point by a man that she trusted while she was young and didn't tell anyone about it. Her behavior is pretty typical of , anger, betrayal and self hate. You have to understand that you can't make her admit to anything or seek help. All you can do is be her friend and encourage her to get away from the guy who is abusing her and be there for her in any way that you can. Encourage her to believe in herself and reinforce the fact that she is in complete control of her own fate.