What’s making him act like this?

So me and my ex have somewhat been texting back and forth. He asked me to come stay the night with him. I did. He said that it wasn’t just for us to hookup. He just wanted me to come stay. I get there and we cuddled and talked. He acted very jealous when I hooked up with a guy 2 weeks ago. He brought up hoping he was a better kisser. He said that I didn’t need to loose weight because I was perfect to being with. We did make out too. He also said if it wasn’t for me living at home I’d be the perfect ideal girlfriend.
1 y
He also said while we were cuddling. That he was getting hot but he didn’t wanna let me go
What’s making him act like this?
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