Yeah, the dating thing is a definite no go for me and I realize that. For me, the reason is your #1 above. I basically am tired of living on the set of Jerry Springer and I don't want to do anything to add to that mess.
As for honoring my vows... well, I think those have pretty much been trashed by her at this point so I'm not so concerned with that.
For me, I am living on the opposite end of town. Although it is a small town of only about 100K people, the few miles in between give me what I need. I pretty much see her on a daily basis due to the kids (their activities), but I can safely go grab a beer at night and not have to worry about seeing any mutual friends.