You are chasing something that was never built to last. He did not pull back because you messed up, he pulled back because the reality hit him: you are married, and this was never supposed to go further than a thrill.
In the moment, it felt intense. Those kisses, the way he held you, the forehead kiss, that will mess with anyone’s head. But once the guilt kicked in, he snapped back to himself. That is why he went cold so fast. Not because he stopped liking you, but because he does not want to be that guy.
And you are hoping you can somehow rewind things and make him want you again. But trying to win him back will only push him farther away. He has already decided this crossed a line he cannot sit with.
The only way through this is to stop chasing him. Take your heart back, take a breath, and look at what pushed you into this in the first place. That is where your real answers are.