Advice on a guy situation?

There's a guy we have friends with benefits relationship. We good as friends, but as couple, i reall don't know, we have different opinions, he has some things i really can't understand and it's not me, but i see his good side too and sex is awesome he is a great guy, but i don't really think he might be for me. Eventully I see he developed some kind of feelings for me too. The thing is the sex or that we spend most of the time together, i started missing him and getting some kind of feelings, wanting his attention and so on. We still have our seperate lives, like he is seeing someone, i go on a dates, we don't sleep with other people, more we are looking for our soulmates. The thing he broke up a year ago with his long term girlfriend over some other girl he known for years, but couldn't be with her until she got divorced. I can see he was confussed which one to pic and eventually his ex left him and this other girl he has affection to do�sn't want to get serious with him. I know he has somekind of feelings for her, he says he could't be with her, but one time i accidently oversaw they're conversation and he was talking about kids, feelings and so on with her. Should I tell that i am developing something for him and just let him be? I wanted to cut this all communication of ours, but he doesn't let me go,he wants to see me, comes to my place and so on, but i noticed i'm getting hurt of his other relationship. Or should i just not say anything and try o let it fade away? I am confussed what would be the best deal to solve it, he never came to me about his feelings, but i know he feels something through his actions, but i am not sure it's strong enough.