immature? or mean?

One of the last times my bf and I had sex he kept threatening to cum in me. He knows how terrified I am of that, and that I will cry. B. ut he thought it was funny. I physically pushed him of me and wouldn't let him continue, he kept apologizing saying that I knew he was joking, but I didn't. He always says that and I will be in tears. When he went on vacation he "joked" he cheated on me with another girl. He knows that's my biggest fear. He just said that I should've known he was kidding cause he would never do that. I was bawling my eyes out