Well it does sound like the signs are there. It also sounds like you have emotionally detached and really are just trying for the kids and trust me when I say you could hurt the kids more by staying then going.
I can see that you have questioned him and maybe even accused him of cheating which he denies. Have you tried simpler questions not related to cheating like
Where do you see our marriage
What do you think could make our marriage stronger?
Be prepared for any answer but I think get a feel for where he is at and make your decision. As hard as it is you will be doing yourself, him, and eventually the kids a favor.
--------------------------------------
Missy~
Parenting, Marriage, Relationships and More
tripleaytche.com