Does it happen that both got married not out of love? Everything was n…

Does it happen that both got married not out of love? Everything was normal, but something went wrong. The husband is not the first one, and he immediately knew this. But now every day it reminds him. He says his ex-girlfriend with whom he lived for three years (in college) is much better. I'm leaving then, he says, until the child doesn't grow up, I won't leave. Is it because of the pregnancy that affects him so much that on the first one he drove, that here again he drives away. Or can't he accept ?‍♀️ He doesn't respect, he doesn't value, the son as if they finished the father's Gv, and I seem