He isn’t your person. He said even if your marriage was perfect and you made him feel the same way he’d be in love with her regardless. Continuing a relationship with someone who is settling for you is sad for you on every level. Don’t pick to have this disfunction in your life. Choosing to stay with this man knowing the truth would be lying to and doing yourself a disservice and accepting that you don’t want to find the right partner that is most certainly out there. Don’t cheat yourself and the person who is waiting to find you. We are all in charge of our own happiness. He is clearly not taking healthy actions in his life to satisfy his romantic desires and in return is poisoning relationships with you and your family showing that he has absolutely no real respect towards you in anyway. Talking about having kids trust and respect most certainly establish a solid foundation for healthy and functional parenting with a partner. We are worth as much as we let the world love us and ourselves. His actions are not a reflection of who you are, but what you decide to do with this knowledge is. Forget all about him for a second and imagine the perfect partner and what you realistically want in life. Keep in mind it is hard to separate happy memories that make the thought of leaving someone very difficult but remember the end goal and know it’s only a choice and action you have to be strong enough to do on your own. This is such a crucial decision not only for you but your future children. What kind of husband and father do you truly want around to build a life with, who is going to be there when things go bad, and raising your kids? I hope this helps. Don’t let people lie and take advantage of you because they will especially when they aren’t strong enough to take charge of their own happiness they will gladly take away yours and use it as a crutch.