At the core of who God is: He is love (see 1 John 4: 16). And this God kind of love is impossible outside of relationship. Father, Son and Holy Spirit have all the relational

fulfillment they will ever need within themselves. But their love is so big, so good, so compelling that they are not content to keep it to themselves. God created the world not out of need, but out of love. 

Perry, Michele (2012-07-01). Invitation to the Supernatural Life, An (Kindle Locations 342-345). Baker Publishing Group. Kindle Edition.