Perhaps there is more to the situation than you are able to see. Something may be on her mind and she is not able to see your point of view beyond her own thoughts. Having a third opinion, mediator if you will may help. Sounds to me like it is just a gap in your communication.
On the other hand, if you are truly looking for an exit point in the relationship, it wont matter much if you break up over this situation or another. If you are not happy for any reason, (Say you just want to be on your own, don't want a commitment, etc.) the relationship will eventually end. Best way to get to the bottom of this is to be honest with yourself and each other.
You can break up with them way you break up with any other kind of girlfriend. If she's being horrid to you, all you have to do is say, "I don't want to be in this relationship anymore"
how do i break the silence when he's been lately so quiet?
The only one that can break you and your girlfriend up is the two of you and if you love each other then communicate about what is happening re the actions of your girlfriend's friend trying to break you up. It is really up to your girlfriend to decide if her girlfriend's bad actions towards both of you are worth keeping her as a friend. There are generally only two reasons for a girlfriend to try to break up her friend and her boyfriend and that is #1 she is jealous you are taking time away from her being with her friend or, #2 she may be in love with you.
Well wait for him to break up with his girlfriend but don't be the one to break it up.
She wants to break up with you
the guy might not really want to be with her, but is afraid to break up with her and is probally being honest with you.
Not for that
Being girlfriend and boyfriend must be a mutual thing.... both of you have to want it. Unfortunately it seems that she doesn't want it... so you have to move on.
break with the girl :D
Why are you dating my girlfriend?
It usually means that he sees you as a friend and he's just being polite, but he's not interested romantically. unless he plans to break-up with his girlfriend
Probaly your girlfriend or friend is busy lately , she thinks that the relationship you have is having no special sparks,or she's planning to break up with you.Basickly dont sit around waitng for her to call,call her and maybe she was waiting for you to call.