I think I know what goes wrong in marriage. Men want security and comfort. Women still want to be adored. They want to feel like a woman. Being a woman and feeling like one are two completely different things.
Make her feel like a woman. Especially if you have children, she needs to know you see her as a woman, not just a mother.
Marriage isn’t this thing that happens to you. Once it’s done, that’s not it. You need to wake up every day and make a fucking effort. Love her. Kiss her. Hold her hand. Make her a cup of coffee.
Tell her you love her but remember actions speak louder than words. Show her that you love her.
Be tender. Be a Man. Be a Husband. Look after her. Protect her. Fuck her.
Just give a fuck.