I need advise šŸ˜© plisssss

My bf and I have been together for 3yrs now, I am 3 yrs older than him and on spring break I went to see my family out of the state and he went to the beachšŸ˜’ ā€œaloneā€ spending allll day ā€œrelaxingā€ posting snapchats of him in a hotel drinking, and I got so fkn mad bc when weā€™re together he donā€™t want to go out not even to the mall, he said too much people gave him head hache and then he spent the hole day at the beach posting videos of thousands of people and girls half naked. He didnā€™t even told me he would go till he was there (we lived 3-4 hours far from the beach) and I just went crazy bc we have been having troubles, reason why is he thinks he can do things like that but he said I canā€™t (bc I have two little girls) and ā€œI donā€™t need/have to go out without my girls!ā€ (Heā€™s not the biological father but heā€™s been with them in every single aspect) I know my girls love him and he loves them without doubt but he has these actitudes some times when he act like heā€™s single and immature. Idk if im exaggerating but I donā€™t want a man that canā€™t act like an adult and I blame his age but 3 yrs is not that of a difference to act like a single guy, and when I talk to him about it he said heā€™s been with me and my girls bc he loves us and him going out alone doesnā€™t change that and I respect his space and everything but the way he acts doesnā€™t add up with the things he said to me. Also, heā€™s always talking about ā€œour futureā€ as a family but when I said something about marriage he completely change the subject. I really love him but I want a man and his attitudes are just not what i expect, but then i feel bad bc of my girls who love him like their father and idk what to do or think/expect if rn i dont see the things he promise to us.