Hey cheesy, I saw your post over on CLD's thread, so I thought I could offer you some support. I don't want to waste time there anymore, I think we are being catfished or something.
Anyways, I haven't read your whole sitch. I can tell you I was 27 at the time of bomb drop with a baby girl. I know 27 can be a rough age for all of this. I understand you not feeling "happy" or "content". I think you may be putting too much pressure on yourself to feel that way, because you don't want to feels so sad anymore, which makes much sense.
If you need some help getting out of that dark place, Ad's do help. Your GAL activities are pretty good and you are living your life. Continue with IC. You do eventually stop feeling so sad. A day will come when you find joy in things again.
Try to not give as much info to MIL, she seems to thrive off of this stuff. And you should always be moving forward. Moving forward does not mean dating. Moving forward means building your life and working on yourself. Detachment is not letting your W's emotions and actions dictate yours.
Often people feel as if they need to move onto the next R. That's moving on. It's not. Being ok with yourself and being ok being lonely even, is very healthy. It will either strengthen your future R or a new R with your W, whatever the path may be.
Live your life, walk your path, and those who see what a great guy you are, will join you on it:)