i am 23 years old, i was in a relationship since the last 3 and half years, i loved my girlfriend very much but after a year of a relationship she cheated on me with my best friend, she told me herself about it after a while and said she didn't have sex with him and she was sorry about it so i forgave her that nothing would happen again. in the mean time she became very close to him and my parents didn't like it so i told her but she won't listen, she said she is too independent, meanwhile she continued to be with me and had sex with me. but she would go out with him kiss him and left me alone. when i threatened to leave her she said that she is mad and threatened to kill herself she even cut her wrist more than a dozen times now that i left her she went out with another guy and made out with him a couple of times and asked me to come back or she will show me her loneliness like this, by going out with other guys. now my best friend and the other guy has left her and she realizes her mistakes and wants to come back to me and when i said no to her, she threatens to kill herself and even tried to commit suicide by cutting her wrist. i am very afraid as i feel like it would be my fault as i didn't give her another chance but i know i will be miserable with her but i know if she does something i will be miserable. she is consulting some psychiatrist too. please help me i still love her but i am helpless