Try to remember the happiest moments that you have experienced together. Go to the cafe, where you once loved to dine, stroll through memorable for both places, do what you love to do so before together. Return to the past at a new stage of life together sometimes helps to forget about mutual resentment and remember how it was possible to make a loved one happy.
Since the cause of family crisis often becomes a routine, try to briefly get rid of it. Plan your buddy, save money and go to a luxurious romantic trip to Paris, Rome, Venice, and so on. Visit the place where you have not been together, find a quiet hotel with special rooms for couples. You can also travel around the world. Any of these options will help both of you to forget about the annoying way of life and how to relax.
Go do something new, it will be interesting to you and your partner. Fading feelings may flare up again if the two of you will realize that not well understood each other, that there are many cases that you are very interested in doing together. Open a small family business, try to do paintball, skydiving, etc.. Experiment and look for something that will help you regain the love and perhaps even strengthen it.