I think once you lose respect for your cheating spouse, you see things a little differently. Sometimes, part of that process also includes losing some of the emotional investment you had in them as well (it did for me, anyway). While I wasn't ready to jump headfirst into another committed relationship after I moved out of his place and into my own, I sure wasn't going to sit in the dark every night for the next 5 months, crying into my beer and lamenting my loss, either. At that point, I felt like I'd already invested more time in him than I should have, and wasn't going to waste any more
time on him.
And I didn't.
You sound as though you're starting to see the possibilities of one day being free to meet other people and enjoying being single again.
I loved it. I highly recommend it.