I need to quit him.

 I've been talking to theirs guy for about 5 months and we have sex almost every other Friday (it's mind blowing to.) the problem is he's a little player and talks to other girls and when ever I bring it to his attention he tells me not to worry about it... So how do I drop him I've tried in the past were I'll ignore him or make up lame excuses but he just gets mad and we end up in a fight and he doesn't leave cause he doesn't want me to go. How do I drop him?