tell him that you fell sorry for him but things just didn't work out - try to tell him when he is by himself.
If you still like her or want to be her friend, then yes.
If you have feelings for him still, let him know
no you shouldn't your friend will become your enemy you should ask her is it alright trust me been there done that
You should tell him that you really want to be his friend and that for some reason you just don't like him anymore and that you feel bad and want to continue to know him but as a friend. If he still hates you then that just means he still likes you and it will eventaully ware off for now just give him space and let it be.
give her a kiss and run
It really depends on why they wanted to stop being friends with you. I would suggest talking to them and telling them that you still want to be friends. If they say no then don't pester them. Move on and find better friends who'll appreciate you for who you are!
Some times if you really like him, but some times your best friend might still have feelings for him but if she doesn't, well go a head ask away but don't tell her if she does still have feelings 4 him!
Since you broke up with your boyfriend it is highly likely that now that he is dating your best friend you are either jealous and it probably isn't love at all, but you just don't like to see him date your friend.
Tell him that e has a girl friend and that you already broke up. If you still like him, ask him why he's flirting with you. And why he's doing so while he has a girlfriend. See what goes on then!
He didn't. They are still together
ask them. if they still say no, look for signs of lying. if you really are her friend, you should understand how she reacts.
it really depends if you like the friend then why not just make she he/she knows that if anything happens that you will try to still be friends.