You can't convince him. You can tell him and your reasons for thinking he is not a good friend but ultimatly he must make up his mind.
you ask your boyfriend if that is true
definitely be true!
Tell her your a true friend and tell her the truth. Do you or do you not.
no i had a boyfriend who used to be my best friend
Ask him whether it is true!
She may not as true friends just don't do that. Unfortunately you are going to have to learn from this situation and not repeat it in the future.
ask him if its true and why he did he ask her and not you. either that or dump him
yes but if you give him a hard time about it first, he might do something nice for you to make it up, if he is a true boyfriend
The only thing you can do is just move on if he cheated on you with your best friend. Don't be mad at her, it's not her fault. It is his fault he was not a true boyfriend after all.
If you want this girl's boyfriend to dump her, you are clearly not a true friend of her's. The best thing you can do is leave the two of them alone and don't go looking for drama or u can make her look bad.
i dont think that is a true friend because a true friend would not like ur boyfriend and your boyfriend is not true either if he likes her back think about n pick bettre friends and boyfriends
talk to your friend, tell her to back off. either that, or if she's hitting on your boyfriend then she isn't a true friend.