I encourage you to read 1 John.

You'll find lots of stuff in there about "love" and it's source and outworking.

Basically:
God is love
All love comes from God
the greatest act of love was God sending His Son Jesus to give His life for us.
We are called to love like God loves
We love because God loves us
We can't love God if we don't love each other
If we love each other God's love lives in us.

A great book.

Blessings
Cat.