So hurt and confused

My husband and I have been married almost 4 years and we struggled with wanting kids(he always wanted them, I didn't based out of my fears). When I worked through my fears and passed my licensure exam earlier this year, I finally felt ready to have a baby. When we officially started trying, he blindsided me and did a 180- he stopped being intimate and slowly(but really quickly) isolated from me. It's been 5 months since all of these issues started and he's continued to isolate from me. He says he is not cheating, he feels numb and doesn't know if he wants a divorce. I gave him an out and said I want him to be happy and I want to be happy and if that means divorce, so be it. I've been bringing up our issues almost every weekend and finally told him I wanted a separation. He said okay pretty quickly and I'm heartbroken. has anyone gone through this before where the husband tells you he's numb and doesn't know what he wants? We have kind of tried marriage counseling for the kid issue but whenever I tried to get him to go over the last few months, he told me he didn't want to go because that would mean we have problems. Yes, he would rather ignore the problem and me but I can't. I'm not wired that way. I totally wish I was. Can anyone else relate?