Replies to 'Infidelity'

Just because this isn't physical (that you know of) doesn't mean it's not cheating.  If you do a google search on online cheating and divorces because of it, you will see that even the law is also starting to recognize this as a form of infidelity.  If it did come down to a divorce and you needed to, these women can be called into the divorce court to substantiate the infidelity - bet neither he or them would like that too much.

It's time to give him an ultimatum; it's them or you.  He knows what he was/is doing was/is wrong or he wouldn't have gone to such lengths to hide it from you.  He knows he's playing with fire and it's a matter of time before he actually meets with one of these women. 

Change your email so that you only have one for the two of you.  Make sure the cell phone bills come directly to you or set it up online so you can see a history of the phone calls.  And I'd also contact all these numbers on the bill that are unfamiliar to you and let them know he is married.  He didn't tell this woman in Canada that he was, so I doubt any of these other women know either.  He's playing them as badly as he is you.

If you want this to work with him, I suggest counseling and I think you need to get started on it quickly.  Best of luck and let us know how you are doing.