| | Re: my husband kissed someone else....
His remorse is a very good sign. It does seem that he is very much wanting to reconcile and feels horrible. If you do want to have him back I think at least you have a repentful H, more than many on this board. But it's up to you.
The fact that he was regretful even to the OW before you found out is also a good sign. It was a serious lack in judgment, and given your prior marital history you may be extra sensitive to it.
From an outsider who was betrayed by his wife (not physically though), this seems rectifiable to me, but that's only the case if you want it to be.
I agree with the poster above who said there must have been something secretly wrong. The marriage sounded too good to be true - something doesn't add up.