I tell couples who want to get married that there are three kinds of love it takes to make a marriage work. There is a friendship love, a romantic love and a commitment love that all must be nurtured for a lifetime. The first two of these are something you feel. The third is something you choose to do. Nurturing all three is a choice that takes intentionality and makes it possible to sustain love for a lifetime. You need to learn to make love a verb.
Love is something you don't just "fall into" (and out of). It is something you do. It is a verb. Love him. Love her. Even when you don't feel like it. For more on this topic, you can listen to the message I preached on this at my church HERE.