HUGE RED FLAG. I automatically noticed how emotionally manipulative and abusive he's being to you, because my ex did the same. Mine cheated and whenever it was brought up or I broke up with him, he cried and threatened suicide. That is complete manipulation and abuse and unacceptable. He's a cheater and has obviously shown that he will never stop because, as you said, it seems to have gotten worse. Don't even try talking it out or staying with him. It will only get worse. Get out while you have the chance. And trust me, he won't kill himself. That's just a manipulation technique. Even if he did, he'd have no one to blame but himself. You are not in the wrong here, so don't think you are and don't let yourself stay because you think he might do something. Please get out of this relationship as SOON as you can. Good luck and you can always pm me if needed!