In the First Letter of John, we hear, "It is not that we have loved God, rather God loves us"; and in the Gospel of John: "It is not you who have chosen me; I chose you...". God takes the initiative in everything. Before we were even born, God loved us through and through (Psalm 139).
Our love for God, therefore, is a response to His love for us. Everything we do -- practicing our Faith, praying, serving others, etc. -- is an attempt to be like God in our actions and words.
Love one another, because God loves you.