I Am Not Getting Any Younger

ive been with my boyfriend for 3 yrs and i raise HIS 3 kids. the first year he didnt have a job the 2nd year he got fired from his job because he thinks that he can be his own boss. the 3rd year i got him a job with my boss my boss also financed a 2012 truck for him. ive done everything for him. we have a house to gether. he knocked the walls out of both restrooms to remodel the..............2yrs ago.............. they still look the same. i asked for his help when i went to school to help me watch feed and bathe HIS kids and he couldnt i had to drop out. i have 2 jobs to help with expenses bc we're DIRT BROKE and he waste my weekly check. i know i should leave but i feel bad for the girls because i would be the 2nd to abandon them............. help me