To be honest, I am last person who should give marital advice. Not that I need the answer to this, but how does your wife feel? I would not be surprised that both of you feel the same way. I would also not be surprised your children sense something as well.

I have a friend who one day told her husband she was not happy; he replied me too. They worked on their marriage and it seems to be going well from what I can tell. I have seen them together and both seem to be happy. They share their lives but also pursue their own interests.