There are no proper signs of a girl whether she is going to break up or not. But certainly there are various things that tell that. It might be the case that she flirts a lot.
You should tell the other girl and both break up with your boyfriend.
It is hard to tell whether a girl will break up with her boyfriend or not. However, do not assume she will. It is a good idea for you to keep your expectations in check just so you do not get hurt if she does not break up with her boyfriend.
Just tell him gently....."listen, I have a boyfriend. Just saying"
just wait until they break up and when you have a chance tell her how you feel
Tell him you will call him in a month if you are still single.
You're boyfriend will spend hours on the phone with her and he will begin to see flaws in you he's never seen.
Just tell ask him if something is going on between them and see where it goes from there
ask him dont be afraid tell him to tell you the truth or else your going to break up with him
Well then the girl is being cruel and needs to lay off! If they actually like the boyfriend they can accept that the guy is happy (NOT at the discretion of the girl).tell the girl to lay off and if they don't, tell the boyfriend the girl is lying and and why so you can leave the decision to him.The girl should not believe the not-so-friend because she has to ask her boyfriend first. You cant just believe someone about your relationship without asking your boyfriend first. You should trust him if he's normally a trustworthy guy and if he doesnt have a history for cheating. He would tell the truth about it and just tell the not-so-friend to leave you guys alone and say your friendship is O-V-E-R.
Answer he tells your friends he will break up with you or when he talks to u says short stuff like hows it goin?
well tell her how you feel if your confident about it, maybe she will come around otherwise i would suggest getting closer to her, as in more friendly to start off with, like best pals, not like your going to perv on her, then when your really close then maybe tell her how you feel about her relationship or if you want to be evil, take a photo with her boyfriend with another girl hugging etc. or tell her that her boyfriend has been seen cheating with another girl you don't know, and get a friend to back this up with you to make it more believable :P
She may like both of you, but the fact that she only calls one of you boyfriend should tell you where you stand with her. She has made her choice.