If my gf put me through half this shit ur bf is putting you through I'd fukk her best friend, video tape it, and have it playing while I'm fukking her sister at a time and place where I know my gf will walk in on me. Then while she's in shock/despair I'd bitch slap her and throw her out of my life so fukking hard she'd knock down every wall she hits on impact. Then I'd finish bangin her sister for good measure.