My boyfriend never had a serious relationship and now we have some childish issues. How should I deal with inexperienced man?

Anonymous
He is 33 yo and his last relationship ended when he was 24. They never lived together, nor had a sleepover even once. Since then he only dated casually.
At first we had an issue with him texting multiple women, then we had an issue with him adding random girls on socials and texting them, then we had an issue with him running to his parents home on every single day off he has not spending any quality time together.

He is constantly scared of losing his identity, his habits etc.
Seems like he doesn't know what are supposed to be his responsibilities and priorities when in a serious relationship. He wants to have a girlfriend he doesn't make any plans, organizations etc in couple. He decides and just tells me, saying I can't run his life.

I never had these kind of issues with any man before him. They were all well experienced and knew exactly what to do, say, provide etc.

How should I deal with him being so childish?
My boyfriend never had a serious relationship and now we have some childish issues. How should I deal with inexperienced man?
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