If you don't she will get stiff joints. Really, You have no right to tell her what she can or cannot do. Get over it. OK?
Unfortunately there is nothing you can do or should do. They are obviously with someone that they want to be with at this time in life and it is best that you move on and let them be.
Unfortunately if she is choosing to be with this other person there is nothing you can do nor should do - let them be, let go and move on. She has to realize on her own if there is a problem with him but until then she has moved on and so should you.
If you are close to this guy then you should just let him know how you feel and if he continues to go out with this other girl you should just move on. Hope i Helped!
A girl should never fight with her ex-boyfriend's new girlfriend. The girl should move on and let her ex and his new partner do the same since fighting will not solve anything.
depends...from where
Make a move
no because then your girlfriend would be cheating on you with your friend and you will be mad
Um, maybe you should just let this one go. Seriously, give it up. Move on.
Find your next girlfriend and move on.
not unless you trust her ;)
The answer is in the question, my young padawan.
Only if you are a lesbian too