It reminds me subject from one seminar i was attended some years ago. I was quite surprised to learn that in the great literature of all progressive societies love is a verb. Reactive people make it a feeling. They are driving by feelings. Proactive people make love a verb. Love is something you do: sacrifices you make, the giving of self. The author advised to a man who was complaining about his family situation saying "the feeling of love just is not there anymore" - Love your wife. If feeling isn't there, that's a good reason to love her: serve her, sacrifice, listen to her, empathize, appreciate, affirm her.
I like this theory. Unfortunately in practice there are too many factors to consider.