I'm sorry to say that leopards rarely change their spots. He cheated on you the first time and he must have seen the devastation it caused, the hurt, the upset, the consequent jealousy. He should have learnt from that experience and realised that seeking a quick thrill wasn't worth all the pain but the fact he's done it a second time (and is emotionally abusing you too) makes him very self-centred and selfish. You know deep down that you can do better than this. You may find yourself happier without him and you'll certainly be able to find someone else who can cherish and respect you.