I do not really believe in love, at least not the way kids today use the term. Love is a decision about how you treat someone. It is your commitment to treat them this way for life. Kids often mean the emotional feeling, which is intense at first, but wanes. It cannot be depended on. But, commitment can be. The VOW, pledge, promise, that is the commitment. It stands when you emotionally want to twist her head off, or when he is irritating the snot out of you.
This commitment before God stands, when all else fails. Rough times pass. Emotions change. They rise and fall, but you cannot stay for the rising if you abandon your commitment during an emotional valley.