advice needed from the girls

Ladies I need some advice. Me and this guy have been f buddies on and off for a little over a year. I had this feeling that he was seeing other girls while doing it with me. So I mentioned it to him and he said that he wasn't. Well tonight we were doing the deed and he makes the comment "that's the second time I've screwed someone and fireworks have went off in someone's yard" so I get mad and proceed to tell him that he better not be messing with any other chicks or drop him like it's nothing. He just said "okkaayyyyyy" I'm actually kinda hurt about it and need advice on what I need to do...