Thanks for the responses so far.

I am doing my best to stay positive, and I have a lot of distractions, but it still comes back to bite me at times. I guess when my kids come back to me and tell me about the fun things they have done with Daddy and his 'new friend' it hurts a lot.

Also, whilst I am currently in a relationship with a lovely lady I am having issues there whether or not that this is right for me. Most of this doubt comes from the fact that she has 3 cats and a dog whom she treats just like children. The cats are inside cats and never are allowed to go outside. They drop fur everywhere, are into everything and her place just has a 'cat' smell to it. The dog is like a child. I love cats, but have never had to live with them so closely. I want to move in with her but I worry that I'm not going to be able to deal with the cats.

Do you think that it is silly to be upset over this issue. Would this be a deal breaker for you?

I guess, having doubt about this relationship, makes me feel worse when I think of my ex in a happy one.

I'm a mess. I would love to hear from anyone else who has any suggestions or constructive advice...