For me, love is best defined as a choice to be with someone. The choice can be fleeting, as many relationships are, or it can be ongoing, as I hope most marriages/friendships are.
How you define “with” is continuously in flux as our moods and feelings are. Some days, I choose to be with my wife in a physical distance sense, and other days I am with her on so many more levels. But I always choose to be with my wife, no matter how much I struggle with what “with” means each moment.