Fwb advice.

I'm friends with benefits with this guy. And this is kinda long complicated story but I'm gunna cut it short and say at one point that at one point we were living together. So he saw me with this guy and i was texting the other guy and he is all like why are you text him when he texts other girls all the time and he was also like he is not all the great I don't even know why your hanging out with him. But then he was gonna invite his ex gf over right after i slept with him and I said you could have a lil more respect *I never brought the guy over to the apt I always saw him away from the place.* anyways we got into a argument over that and everything was fine for while. Now were not living together. But every time he gets a gf he does everything he can to make me jealous. We are still friends with benefits and I like him a little bit. But why would he always try to make me jealous with all the girls hooks up with?