Talking to this guy for a bit

So I have been talking to this guy for about a month now. We met on a dating app and it was very easy for us to open up about each other quickly. When we went on our first date everything went really well. It seems like whoever we talk on the phone or text we get upset very easily. He gets upset when I say I don’t want to do sexual things sometimes because I think it’s a little weird to do over the phone and we haven’t been talking for that long. And when I bring that up he calls me by his ex girlfriend because she didn’t like to do sexual stuff with him. I told him that I don’t like that he called me his ex because it’s very disrespectful towards me. He said he was sorry that proceeded to do it again and he said well stop acting like her and I won’t call you her name. When he does this it seems very manipulative but I know he doesn’t mean to be on purpose. His ex cheated on him so he might just feel like he can’t trust me or wants to make sure I’ll do sexual stuff with him unlike his ex. I have done stuff with him on the phone a couple of times which was okay but I still feel like it’s pretty early to being doing that sort of thing. Whenever we hang out in person though it’s so easy and we get along so well. But when we are on the phone he likes to make fun of me a lot and a few times is fine but he is constantly doing it which makes me upset and it hurts my feelings a bit. I have talked to him about this and he says that I can’t take a joke. It sucks because I want to be with him because he prioritizes me and does things for me and can be very sweet at times but when we are not together which is every other week because he lives a little farther away we get very upset with each other. He also likes to shut down and hang up the phone when it comes to talking about things he doesn’t like. It’s because he doesn’t want to argue but then we can’t communicate at all because he feels like communicating is arguing. I don’t know what to do to help him change or make me feel better about the situation. Help please!!