Why do you blame yourself?

He is a grown man, who decided to have an affair with you and leave his wife for you and get divorced. Now he has what he wanted but does not want it anymore. Please do not blame yourself.

I dont know him - but it looks like there is a pattern there - like a child who has a cherished toy but the toy but he is not really attached to it so he finds another toy and so on. He may have attachment issues and please do not beat yourself up.