He's been cold and ignoring you recently with his affair with Sarah. He didn't care about you, until he started to be suspicious about you cheating on him. He doesn't know that you know about him and Sarah. He doesn't love you, but he still can't bear seeing you with someone else. How bold of him, knowing he's doing the same. But he wants you to be his, he's extremly jealous and won't let you go for another man, for his pride.