Hi Huddy, I'm in a similar type of situation and it gives me strength to hear how others are coping. My W has been gone since September (BD Aug) and things have been real tough for me. Mentally found it hardest as to why she did not or could not say what our difficulties were - I gave her ample opportunities.
I'm trying to do the detaching, GAL and tough love thing, although I am listening, validating and "showing" her how I've changed a lot in this time (I'm sure I was borderline depressed before).
Like you I'm thinking of the long road, still have feeling for W, and know it is best for the family to fix this rather than take the easy option and walk away. Hopeful but trying to have no expectations of any chance soon.
Stick at it, I know your pain, just enjoy the good times with your kids and do all the stuff you would never have done before!
M 10, T 18 M: 36, W: 35, D: 8, S: 6 EA: Oct 12 ILYBINILWY: Jan 15 BD: Aug 15 Separated: Sep 15 Miss you: Jun 16 Aug 16: Dating (!) Oct 16: Selfishness returns... currently: disgusted