God the Eternal Father did not give that first great commandment because He needs us to love Him. His power and glory are not diminished should we disregard, deny, or even defile His name. His influence and dominion extend through time and space independent of our acceptance, approval, or admiration.
No, God does not need us to love Him. But oh, how we need to love God!
For what we love determines what we seek.
What we seek determines what we think and do.
What we think and do determines who we are—and who we will become.
*From Elder Uchtdorf's talk during the Saturday morning session of conference. I like these words.