mind body soul do some not belong?

why do i feel like i dont belong, nothing is ever right i am always the bad person when all i do is everything for everyone else i even quit my job a good job and lost a lot to take care of my boyfriends kids and i just mess it up. he wants me to take care of the disapline and school activaties and the complaints but if they get upset cause i wont let them do what they want like stay up till five eat all day long and whatever they want pick up their garbage and be the maid i try sooo hard and always end up being called something horrible and crying all night hating myself i think i have always hated myself. Do some people just not ment to be here? i mean my soul i feel like i should give up i have nothing anyway why live like this i mak everyone miserable