I often wonder if I'm as good to my spouse as I am to my pet. The pet gives an unconditional love... and so it's easy to give that back.
I find that more difficult with another human being. Perhaps because they too are judging. None the less, if I look for the child like qualities in my spouse and wonder why he whispers while walking away (instead of immediately blowing up), then look for those things that endear instead of frustrate, I have a much better relationship daily.
Don't we all want someone to adore us? Then give that undying love and see what comes back.