Should i stay or should i go?

I've been with my boyfriend for 5 years. i worked when i met him and he mad lots of his own money but needed someone to stay home and watch his kids (5 kids, none of them mine). So I ended up quitting my job. I went back to work a year later and have been working ever since. 2 yrs ago he lost his job and i have been supporting him. I get paid, he spends the money within 3 days of my pay date. im tired of him not working, he hasten even tried to get a job. what should i do. we're not married, they're not my kids but i love him and the children. I'm just tired of working and not getting anything to show for it for myself