Women who are getting a divorce are in a much different situation than women who are widowed as far as their reentry into the social world. It still hurts. We were together about 5 months or so, and he was my "first time" after my loss. Torn apart.
If you do happen to make it that far, be respectful. Be sure to let your partner specify how they want to remember or honor their lost spouse, and tell your new partner how you like to pay respects to yours. I was living happily ever after before. You will push her away faster than you know by expecting her to keep her past in the past.