It is a fine measure of our devotion to the Lord and Saviour Jesus Christ that we can’t but help speaking out about it. I believed, therefore I speak. Talking about him is a natural fallout from believing in him.
But this is not a question of simply believing in him theologically or Biblically — it’s a question of trusting in him as a friend and as a business partner, a partner in the family business of extending the Kingdom of God.
It may be good to ask him to loose your tongue and to actively show you how to build that friendship, at least as far as your not being able to help talking about him to other people.
There is much to gossip about!