Sacrifice for another person is a lost art. Most people just aren't willing to do much sacrificing. "It's my way or the highway!!"
Sacrificing your belief in God or your morality isn't what I am talking about, here. I am talking about now having to always have things your own way. And it's not needing your needs met on a 24 hour a day basis. Sometimes, you have to meet someone else's needs, despite not meeting your own.
Perhaps it's giving a back rub that really don't want to give because your spouse has had a stressful day. Maybe it's giving up your savings for a new purse so your spouse can have that new golf club he wanted. Or, allowing your spouse to sleep in, even though you are tired as a dog, to make them happy.
Sacrificing your own needs for your spouses, and not for the idea that they will return the favor, can be very freeing. These small acts, listed above, can mean the world to your spouse and can heal a lot of hurts. Try sacrificing for a month. Maybe, try every day to sacrifice in a small way and see how well it's noticed.