I broke up with him three times but he keeps staying with me, why?

I've had trouble trusting men I always broken off relationships with guys. But this guy is so sweet, we met on Valentine's Day. But we have been on again and off again. I broke up with him three times. But he still stays by my side no matter how many times I break up with him. I'm trying to chase him away just like I chased away every other guy but he keeps staying lol why is that??