I have to laugh when you say that facebook is invented by the devil, I think it's only second to text messaging.
Many many of the couples that I see are now finding their lives interrupted by the pernicious effects of texting.
You're right on the money when it comes to the things to look for--if not for sexual affairs, then for emotional affairs.
See the article:
http://www.hitchedmag.com/article.php?id=306
In my experience, in order for people to begin to work on their relationships, all communication with attractive others must stop. Even if you are being paranoid, it's still how you feel and you're looking for him to show respect for your feelings. The real questions is: Who is more important--a friend from elementary school or a spouse.
You've got an uphill battle in front of you!
Remember: Comments by Dr. Haltzman are not intended to reflect medical opinion, advice or recommendations. They are observations intended to generate discussion on this forum.