What am I waiting for !?

Been with BF since 08/10 , we have a 3 yo bby boy together that will be 4 in July & we are expecting #2 , he just turned 24 & I 22 , feel like I'm stuck btwn a rock & a hard place I love him damn near more then I love myself. But I'm SO tired of him putting his worthless family before me , he grew up on the eastside & I the north side , if that can give you an idea about how totally dif our families are , I try not to down his family but it's like they don't do anything to help better him or encourage him , as well as they don't try to better theirselves, most of the females in his family are unfit mothers and drug addicts & the males are all in and out of jail . I don't want my children around any of that , I don't even allow my son to go around his fathers mother or sisters (his mother does drugs , as well as his older sister & her children are all rude and disrespectful & his baby sister keeps up so much drama & ALL 3 are thieves) , he has a favorite guy cousin (which I understand they are close like brothers) but my bf has something goin for his self and his cousin doesn't , he's a 22 yo alcoholic that has stolen from us as well , every time this guy comes around my bf & I get into REALLY big arguments , bc I don't understand how could he wana have him at our house around our son .... Idk im so confused , when we are on good terms we are literally like Bonnie and Clyde we are so perfect for each other then when we are into it it's world war 1200 like a nuclear bomb !!! I'm sorry to vent jus had to get this out , what should I do please any advice welcome