If it becomes very serious to the point were he will not leave you alone I would suggest filing a restraining order.
It is never okay to date your friend's ex-boyfriend.
Tamara Powell is not Crazy her Ex-Husband is for stooping that low.
Tell your boyfriend that if you wanted to be with your ex you would be. Clearly you chose him and no matter what the ex says there is nothing that will make you go back to him. That relationship ended for a reason. Your boyfriend doesn't have to trust your ex but he have to trust you or there will be no relationship. Jealousy is never easy but it's the jealous person that have to deal with it in order to be able to have a strong relationship and he will not do that by making you responsible for his jealousy. You the other hand can try to avoid situations where your ex is.
Sure why not?
You go up to your boyfriend and tell him to choose, but if he can't then break up with him. Why go out with a guy who goes back out with his ex if he has another boyfriend.
To get ones ex boyfriend back there are lots of possibilities. One possibility is to go to an event where the ex boyfriend goes too and meet him there and try to open a discussion or to talk to a friend of him to meet him.
Go back to him
How did you break up?
No, you have them for a reason
you should tell him you still have feelings for him
NO if he was a lying boyfriend that's not going to go away
Why not, he is your ex. So technically he can go out with whom he wants.