2. He makes sacrifices for you — and you're happy to do the same for him. He'll move cities to live with you if you get a new job or finish grad school. You're happy to make the next move for one of his opportunities.
3. He shares the same values as you. You know you both want kids and expect to split the child care equally. Or maybe you know you both want kids and he wants to take extended paternity leave. Maybe you've also agreed that you should each get 45 minutes to yourself to go to the gym every day, or you plan to buy a home and move to the suburbs in five years. You know you're on the same page with things that matter most to you because you've discussed them.