The Bible addresses love directly in several passages:
1 Corinthians 13:4-8 (KJV)
4 Charity suffereth long, and is kind; charity envieth not; charity vaunteth not itself, is not puffed up, 5 Doth not behave itself unseemly, seeketh not her own, is not easily provoked, thinketh no evil; 6 Rejoiceth not in iniquity, but rejoiceth in the truth; 7 Beareth all things, believeth all things, hopeth all things, endureth all things. 8 Charity never faileth: but whether there be prophecies, they shall fail; whether there be tongues, they shall cease; whether there be knowledge, it shall vanish away.
1 John 4:7-8 (KJV)
7 Beloved, let us love one another: for love is of God; and every one that loveth is born of God, and knoweth God. 8 He that loveth not knoweth not God; for God is love.
John 15:12-13 (KJV)
12 This is my commandment, That ye love one another, as I have loved you. 13 Greater love hath no man than this, that a man lay down his life for his friends.
Romans 13:10 (KJV)
10 Love worketh no ill to his neighbour: therefore love is the fulfilling of the law.