Have you ever fallen for someone who’s staying with an ex for the sake of their kids?!

Hi,
My current relationship is troubled. My man has kids with his ex wife and they currently live together. He pretends to be with her for the sake of his kids. He has strongly emphasized that he will never marry her again. He just came to me expressing how he does have feelings for me and how he was wrong for keeping that from Me based on his situation. He stays with her for financial reasons and due to his kids so I kind of understand. But there are healthier ways to coparent. I know his feelings for me are true bc his mom always asks how I’m doing and his eldest daughter really wants to meet me. I need more advice rather than “run” or “leave him” or he’s “playing you” bc there’s situations out there that are harder than the norm.... I’m not sure what to do. My feelings run deep for him too.