1 Corinthians 13:4-8 is good definition of love.
Love is patient and kind. Love is not jealous or boastful or proud or rude. Love does not demand its own way. Love is not irritable, and it keeps no record of when it has been wronged. It is never glad about injustice but rejoices whenever the truth wins out. Love never gives up, never loses faith, is always hopeful, and endures through every circumstance. Love will last forever, but prophecy and speaking in unknown languages* and special knowledge will all disappear.
My own definition of LOVE is...
Love is God, because God is Love. In all the time God must be in the center of our Love to others. Just as stated in the Bible that if we Love our fellowmen we also love God. So better put God in your relationship.