Sounds like he has some stuff to work out yet. There's not enough information there to know if he's drama or not, IMO. I would let him be so he can deal with his other issues. If you want a real relationship, you want one where he's over his ex anyway. If you're hoping he will figure out those issues and then decide to pursue things with you, you can gentle let him know he can call any time, then just pursue spending your time other ways and don't hold your breath. Either he'll come after you or he'll be caught up in some drama. Either way, the outcome will be the best thing for you based on the circumstances that cause them to happen!