Kill them both.
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.
Slap him
He's dating Annalyne Mccord
Thay still have feelings for you there jealous
He probably broke up with you because he was cheating on you with your friend. Then he showed up with your friend.
He feels guilty. He wants to move on but still has feelings for you.
Well, Ed was dating Jessica but, they later broke up when Jessica was cheating on Ed with his best friend! Though , they WERE dating before, yes!
Tell him of your feelings or get out with some friends and forget about it.
If you have feelings for him still, let him know
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!
Let them be. If you broke up with him, he is free to date whoever he wants. If he broke up with you for her, your feelings may be hurt, but let them date anyway.
i belive you should only be mad if you still have feelings for him and your friend knew, but if not i understand why you would be upset but you need to know that because you dont have feelings for him you shouldn't be mad. do you get my drift? -Evie :)