Sharing emotions and spending time together. Communicate openly without harming your spouse. Respect each other and don't yell.
Some sacrifices for each other won't hurt and will enrich your connection. Equally vital is giving each other space and 'Me Time'
It is necessary that you work through your problems. Understand each other's perspective and come to a common solution.
Be a good listener. Always listen to what they have to say, give them the space to speak their heart out and be vulnerable.
Never involve others in your mutual problems. Sort your problems on your own
Keep monitoring each other all day. Surprise thoughtfully. This will please them and strengthen your friendship.
They accomplish a few objectives. This motivates and engages them in the connection.
Support each other no matter what. They need to have each other's back in all life situations.