(((Rouky))). I can totally relate to your feelings. I’m sure many people on here can. I wholeheartedly agree with Juju on this one. The best predictor of future behaviour is past behaviour and it is early days for your XH and his fiance. My XH was great for the first few years too. But then kids happened and financial stresses and day-to-day life got hard and he checked out. I realize now that he is not the person I had hoped he was and that has nothing to do with me. Just as your XH’s behaviour has nothing to do with you. Hardships and tough times reveal the people we truly are. Your XH, and mine, have some serious character flaws that don’t just disappear without some significant personal work and that doesn’t happen just because you substitute one spouse for another.
Keep moving forward. Take the focus off XH and put it back on you. Put yourself out there and do the things you enjoy doing. And don’t worry about competing for your kids affections. My kids remember they had an absent dad for a long time and they are loving having him back in their lives but he is not their mom and neither is his OW. I am sure it is the same for your kids as well. (((HUGS)))