"Whoever does not love does no know God, because God is love." - John, the apostle in 1 John 4:8
God is Love, and His love is very different from human love. God's love is unconditional, and it's not based on feelings or emotions. He doesn't love us because we're lovable or because we make Him feel good; He loves us because He is love. He created us to have a loving relationship with Him, and He sacrificed His own Son (who also willingly died for us) to restore that relationship.
God is the very definition of love itself.