First off, welcome to the group.
I've been mia for a while but I'm back. That doesn't matter much to you, I know.
I won't go into depth other than say this. I've only been married for 2.5 years. I have 1 son with my AW and he is only 19 months. Life with an AW does not get easier and when you throw a child into the mix, the problem is compounded to something I can't even quantify right now.
I wish you the very best. Keep posting. We've all had similar, different, better, worse experiences and we're here to give you a hug and some understanding and maybe a dish of cold advice/suggestions.