TLDR; Connected with old friend friend my  teenage years. An ex made me cut contact with him. We now bith have families, and my SO had no issue with me reaching out. Had a good conversation with old friend at first. They got busy and tried to restart the reconnect a whole day later, as if nothing happened. I was unavailable that morning and let them know. I reached back out the following evening and their whole behavior changed up on me. Did I do something wrong or did be probably not tell his wife he reached back out and got in trouble?

I (28F) recently reached out to an old friend (32M) to reconnect. We had lost contact due to an ex that made me delete all men from my social media. 

I admit, it has been 10+ years since we have spoken. We both have children. I am in a strong relationship where we are able to have friends of the opposite sex. To us, reaching out to old friends you never dated is not an issue. If you did not want contact with someone you have feelings for, you just wouldnt contact or accept contact with them. 

I sent the friend request along with a message saying that I was glad they looked happy and seemed to be doing well. If they ever wanted to reconnect, they could feel free.

 They immediately responded and we had a brief conversation asking how we were and talled about our kids. The back and forth was casual and a bit spaced on my part. They sent me a brief message saying they always wanted to say sorry for mistreating me. 

That was on a saturday, we didn't talk on Sunday, and then Monday morning they picked the conversation back up like nothing had happened. I was a little taken aback by it. I figured since I accepted his apology that he just wanted an ego boost. I ended his attempt to talk saying I knew it was a monday but that I really did want to reconnect with him. He told me I was always able to reach out to reconnect with him too.

The next evening I reached out again to talk and the following morning, on Wednesday he reply telling me he was just hanging out with his wife and baby. There was nothing on his profile about his relationship status or I would have immediately ensured us connecting was also okay on her part. At this point, I didnt want to come off as having alternative motives. I hearted the message and told him how amazing family time is and that I was sure his whole family was lovely. I then started asking how he got out of the service. 

Every answer after that from him was one sided and I got the hint he did not want to further communicate. Why would someone begin behaving this way? Did I do something wrong or should I go with my gut to cut contact? He has other female friends, so his reaction seems super weird unless he had alterior motives. Mine were clear. 

Why would someone respond back like this? 28F