Why is he likes this?

we have been friends for a couple years and then stated having sex about 4 months ago. I cant tell how he feels about me if he has feelings at all. I know he is attracted to me, because whenever he sees a pic posted or i send him one he is all about seeing me. But as for any debt and respect i just dont know. He talks to me about other girls that he hooked up with in the past and they are still in his life. Why does he tell me that stuff, its so disrespectful, is he insecure and needs to feel like he is wanted or something?