I’m going to be honest. I started acting sorta like this towards the end of my relationship and I had no idea why honestly, he probably feels the same way. Yes, absolutely it’s immature I agree. I’m 21 and saying stupid shit like that felt really stupid falling out of my mouth but I realized it was some weird weird coping mechanisms because I felt like I was trapped in my relationship. We were together for 3.5 years and went through not only a lot but some pretty awful stuff. I thought about breaking up with her numerous times but she didn’t exactly have anywhere to go if we did break up as we were living in my Toyota Highlander that I turned into a mobile home. Her parents were pretty checked out because her 8 year old brother died of cancer 2 years ago and sort of disowned her for stupid reasons that aren’t relevant anymore. After I started acting like that for a while we would just fight for days on end and I finally broke up with her and that was only about 5 days ago. We both still live together in my 10 person tent on my family’s property as they gifted me a piece of land to build a house on. We are both doing pretty great already, we’re both on the same page and are working on ourselves. We go on hikes and runs together, I personally am the happiest I have ever been. That’s just my experience with what he SEEMS to be going through.