He told you he needs someoen to talk to, but he isn't taking any actions to find anyone either has he...

I am starting to think he's just playing you on that point...

I am starting to think he LIKES having two children and two women pining away for him while he plays the field for a third.

He may feel some guilt somewhere, but I don't hear any shame or remorse in his actions...

He TALKS guilt well, but he's DOING NOTHING about it... in fact he's just doing more damage.

In my opinion its the same as mb28. Cut yourself out of his life and get a heavy and determined support team on his case to grow up while you rest and take it easy... focussing on being a parent.