I don't know how, but if you can, please help me. Dear Shocked, You have been betrayed and lied to, but your boyfriend has been conflicted and in pain too. Because he has decided to stay in the closet and continue living a lie, he will only become more and more involved in lies and misrepresentations. He may act happy, but he won't really feel good about himself until he is honest about who he is. Now that everything is out in the open between you, consider yourself lucky to know about him before getting even more entangled.
Many gay men marry and have children before confessing to their wives that they're really gay.
I've heard from several distraught wives of gay men who are trying to live with husbands who have no interest in them at all except as a front. Don't be this guy's front. If he wants to pretend he's straight, that's up to him, but you don't have to go along with it. As long as you allow him to come around and act as if everything's okay, you're going to get more and more angry and feel more and more betrayed. Stop pretending that your friendship is okay and accept the fact that for now, you will have to find a new best friend.