I'm confused and don't know what to do

Hello, I want to ask everyone for help because I'm having some struggles in my relationship.

I started this relationship about three months ago, and it was him who asked me out first. I was surprised that he asked me out, and I didn't have any thoughts of dating him. We were good friends for about a year, so I was confused when he asked me. After thinking about it for a long time, I decided to give it a try. But his personality is much more advanced than mine. Sometimes he goes silent and stops talking to me for days without explaining why. He even says he wants to break up because he's older (by 8 years) and feels like doing a crime, yet he also says he loves me..

Lately, he's not texting me either. I keep texting him to find out why, but he doesn’t reply. Yesterday, he said he's trying to control himself. I asked him if he doesn’t like me, to just tell me and then move on. But he's still not talking to me. What does this mean? Why is he treating me this way? What should I do now?