How can I stop making him angry?

Sorry to tell you this, but he doesn't want to be with you. For whatever the reason is. He told you in clearly. You don't need to make up anything to him. He's proven how much he cares by ignoring you. It's sad because you keep trying and he isn't. Now, why today he's acting like Dr. Jekyll, I don't know but you live with him. Is this normal for him? How long has he been like this towards you? Do you think he wants his ex back? I wouldn't put up with that if I were you. If you've tried for so long and you're still unhappy, move on.