Breaking your heart, making you cry, and sending you on the run to London for solace? WTF?!!! That boy needs a SERIOUS slap upside the head, PRONTO!
So...the barmaid with "the 9th grade education" couldn't hold his interest (he's working on his masters or doctorate, right?). Wow! Color me surprised! He ran away, banged the brainless ho, got it out of his system, and now thinks he can waltz home and pick up right where he left off?
EEEN! Wrong answer! Do NOT pass Go, do NOT collect $200!
This boy hurt you and needs to serve some SERIOUS penance before you let him back in your life. He CANNOT waltz in and out at his leisure. If you let him do it once, he'll think he can do it time and again.
Here's what I'd do:
1. Thank him for getting back in touch with you. Oh, and BTW, about his stuff -- would he like to pick it up in boxes or bags? (That will make him sh*t bricks, I assure you :-) !)
2. Continue the dark and distancing behavior. When - AND ONLY WHEN - he expresses remorse and regret at having hurt you, do you CONSIDER letting him back into your life.
3. INSIST on PROOF of a clean bill of health from before you let him back in your bed. Don't suffer the consequences of his mindless idiocy.
4. Consider yourself lucky. Some of us here are dealing with 3 and 4 YEARS of infidelity. That isn't to say that your WH straying wasn't painful - we all know it was - only that it could have been longer and more drawn out.
Kick him in the ass, make him think twice about doing it again, reconcile, then put it behind you. Life's too short to linger in pain one moment more than you need to...