Girls and guys, please help sort this out. What should I do? What is he feeling?

I think you should talk to him again because what's the harm in talking to your ex, who you seem to still be friendly with. Maybe over time you two can talk about relationships and where you two stand because it seems like you two have something go on. Just remember that if you don't talk to him now you may never get another chance to talk to him again and that may haunt you forever, so what do you really have to lose. Go for it and chat him. :)