What to do about ym boyfriend?

Okay me and my boyfriend have been dateing for almost 2 months… We broek up twice but only for like a day if that… I care about him a lot!!! But we fight aalot!!! I can’t stand it! I don’t want to loose him but he can be so immature for being 20 years old he acts like he is 15 at times and he can be anooying and he does stuff that pisses me off sometimes andi tellhim about ti and either he forgets or don’t care. He says he loves me and it seems like he cares a lot aboutme but he don’t show it to much. I don’t want to loose him because before we dated we were best frriends and he toldme if we break up he cant be my friend it would be to hard and I don’t want him out of my life and I don’t want his family to hate me and my family or his lil bro to hate me bc he is best friends with mylil bro and my boyfriend lil bro really wants us together and is going to hate me if we break up bc he won’t understand bc he is only 12… And I don’t want him and my lilbro to stop bein friends there best friends and I dont wantmy boyfriend parents to hate my mom bc there friends they talk to each other at there football games… I don’t know what to do but my boyfriend can be a dick he says he cant help it he cant change he is trying hard to not belike that I told him he has one more chance and if we continue to fight or if he pissesme off a lot again were done for good but I dont want him out of my life… But I nkow I can do better… And these two other guys rlylike me and I think they treat me better than my boyfriend does well I know the one does ugh I don’t know what to do please help!!! Prettyplease. =(