It really sounds like you are dealing with a lot. That's a tough situation for anyone to have to go through. I get a sense he does still love you, but he is very confused right now. Either way, it's not fair to you. Psychically it feels to me that you have challenges ahead either way. I don't see him running home soon, although it does feel as if he could come back into the picture a few months from now. My sense is that he broke under the responsibility and pressure of having a family, and that he wants something easier, lighter, for a while. I'm not making excuses for him. What he did was selfish and irresponsible.
It feels like once he gets what he's going though out of his system, you have a good chance of him realizing what he's done and showing back up, although I can't guarantee this. My
psychic sense if you are looking at 3-6 months more, hopefully sooner.
I'm getting to tell you the most important thing for you to do right now is to take care of yourself and your kid. Put all of you energy into this. Drill it into your head that no matter what happens, you will be OK. I know it's not easy, but you have to do this. Don't be shy about seeing a counselor to help you though this. The stronger you become, the better of a chance you have of him coming back.
Instead of sitting around and dwelling about this (which I see you doing a lot of), try to keep yourself busy - exercise, take small trips out and about, etc. Hope this helps some. Take care of yourself. Keep me updated.