I know dark feels like you've given up. Trust me. If he was to put his arms around you... the switch gets turned back on. I know. Been there.
FWIW, I wrestled with the whole dark thing too. I wrestled with what message it would send, (mine said I was living my own life without him - it was an excuse for him, nothing else). I wrestled with my own commitment to how I would feel, if /when the day came where he shows up your door. All valid fears... but once you get there, you'll realize it's for YOU, not him. And you can zoom up those feelings when you call upon them.
T:22, M:20 H:55 Me:45 H-OW PA: N/07 OW Jan08 Bomb:Feb/08 S: Apr/08 Back together Ap1/09-Sept/11 Oct, 2011, uncertain future/H is a mess. Dec/11 - Doin'friend mode. Some days are better than others.