You don't go there.
You go rape her, and fist her.
Leave them alone together. Find someone else to like.
No.
You stay true to your girlfriend, or you break up with her and date the other girl. Don't cheat.
yes but don't tell your boyfriend/girlfriend why you are dumping them
If he is dating someone else but with you often and you like him, this is asking for problems. It's best to create space between you and him to honor his relationship with his girlfriend.
You dump them, if you REALLY liked your girlfriend\boyfriend. You wouldn't have liked the other person Save
could be because she dose not like it or cause she is blowing off someone else and laughs about it in bed with someone else. Who knows the answer to such questions.
Ask her.
Find someone else, he's a jackass.
Invite someone else if you can then just ask if she wants to go to dinner with you and whoever else you invited.