Can a woman cum too many times?

My boyfriend is a sex addict, he wants me every time I see him, it doesnt matter where we are, he starts feeling me up And kissing all over and i give into his charms, the thing is, he lasts forever, even when i have nothing left, and my legs dont work, he just wants to keep fucking me. What should I do? Oh and is there a limit to how many times your body will let you cum?