What would your wife like you to change or do differently? Put the seat down, get your clothes in the basket, take out the trash, mow the yard before it’s too long, take her out at least twice a month, bring home flowers for no reason, leave her love notes, or text her during the day?
Pick one item on her list and make it your goal for a month to do that and do it well. Then the next month keep doing that one and add another. Keep adding things each month. Don’t brag on yourself, just do it.