I was in a happy relationship with my BF but I found out he is doing my best friend who calls herslef a lesbian behind my back, I walked in on them and walked right back out, they didn't notice.About 20 minutes a ago I found pictures and sexual messages on his phone from a 16 year old, he responded with she wirtes stoires we here improvising, he's 25! He's blaming my borerline personality disorder for my reaction I was upset and angry and he made it sound like my fault, I now feel like , my best mate/room mate was on his side.. . I don't see how its OK.. . I don't have the option of moving out as I don't have any where to go please help