Lizzyjo, my experience was a little bit different in that my husband left me after I had an affair (but after having another baby together and being together 18 months or so after he found out).
When he finally decided to leave the marriage (although it took him about 8 months to actually leave the house itself), it was his decision and not mine.
I wanted to be "married happily ever after" to him and it was such a shock realising this was not going to happen.
He moved out last September and it is only now I can see it was for the best and I am so much happier.
Up until a few months ago I would have had him back (if he had wanted me, which he didn't), but I can see now that that was only because I didn't want to be on my own (with 3 children) and also didn't want him to be happy with his new girlfriend.
I can honestly say now we get on fine, there is no hurt on my part and I can accept the 17 years or so I had with him as good times in my life, but there is no reason why the next 17 years shouldn't be as good, or even better.
I suppose I am writing from the other side of the coin as it was me that had the affair, but ex. told me he could never forgive me (after having another baby, etc.) and that is one thing you will have go deal with if and when you get the chance - will you be honestly able to forgive him for what he has put you through.
There is no way you will ever forget although I am sure hurt will get easier in time, but it is another thing entirely to be able to forget.