Hang in there, it's a tough situation. As for her seeing someone else unfortunately you have no control over what she does but you have all the control over yourself. Don't beat yourself up over her decision and the path she chooses, it shows her character. Maybe it's her way of dealing with the situation by covering up her feelings rather than facing the situation, who knows?
Now that the divorce is final you really need to shift your focus away from her and the past. I know it's very hard but you need to look ahead, it's very important for you, your kids and perhaps even for your relationship with your XW in the future. You have to really just ignore her completely and rebuild your life and if that includes another woman, if you want to, that's OK - I'm sure some here will disagree with me but how much longer are you willing to wait for her? This is the time you need to take stock and decide that so far nothing has changed her mind so you've got to change your actions and behavior because no matter how noble she's not willing to notice them. Do things opposite, go out start enjoying life. You don't need her, you need friends, family, counselors and good times.
Use the divorce as a turning point and an opportunity to implement the changes. Stay in your friends and family's company, you need a support circle, see a counselor regularly and see if that helps you reach your goals. The goals should not include your XW at this time. You need to shift focus.
Me: 32|W: 34|D: 3yo 1st bomb: Feb 2006 (left one day, came back a week later) 2nd bomb: Aug 2006 (moved out, ILYBNILWY) 3rd bomb: Apr 2007 (filed for divorce) 4th bomb: <her finger on the launch button>