Simply because he talks in a negative way about his marriage doesn't mean that his obligations to his wife are any less important to him.
Whether or not they have children is a moot point; he will always feel as if he has to be a husband to her and take care of the marriage, whether he truly loves her or not. No matter how much you may want to walk in the sunshine with him and have him openly acknowledge his love for you, it won't happen. The beginning of an affair is romantic and naughty at the same time.
He's not a bad guy, he may be a wonderfully kind person, but he is also a practical one.
He knows that holding on to emotions that can only cause problems for his family is something he cannot and will not do. To safeguard yourself from too much emotional pain, you need to understand that he can only be a small part of your life and will never be more than that no matter how many promises are made.
And don't ever kid yourself on this important point: He is still having sex with his wife, no matter what you may want to believe.5.