Davide, that's another eloquently written post. I find that moving past the emotional response and trying to avoid the bitterness is a major challenge. I think it's much easier to care less for someone who moves on right away to a new relationship but for those who stay single or married-on-paper while otherwise single it's extraordinarily difficult to view your spouse as doing what's best for them, with no regard to your wellbeing, without an emotional response.