It means you should stay as far away from him as possible. If he as done all that he is not a nice person and should be avoided.
Then what's your problem?
Well this is simple all you have to do is do something that he likes that your friend doesnt like doing with him if that doesnt work tell him in person how you feel when they get into an argruement
Oh she likes him as a BOYFRIEND but he doesnt feel the same way :)
you should tell him that your best friend has been there for you for everything and that you have to stand by her. if he can't accept that, then he's not a good boyfriend.
then she doesnt like you, maybe she jsut likes you as a friend not as a boyfriend
Sit out the drama. There is really not much you can do here.
There was a scandal with Teak yeon, 2PM. But Yoona doesnt have a boyfriend yet...
well first thing is first... who do you love your boyfriend or your old friend that you were kissing in the first place? dont kick your boyfriend out of the house, but tell him how you really feel and when he doesnt agree then you can kick him out :)
become his friend or move on and find somebody better
Be straight forward with her. Tell her gently that she is being a little to intimate with your boyfriend and politely ask her to stop. If she is a good friend, she'll apologize for her wrongdoings and she should stop flirting.
include your best friend into the conversation with your boyfriend.don't just let them hang
Tell her the truth and point out ways to her of how he flirts or likes other girls.