Question: what to say when your friend comes out as trans?
Answer: Be patient. ... 
Commit yourself as an ally. ... 
Don't push. ... 
Keep their confidence and respect their privacy.
Acknowledge the risk they took by coming out to you. ... 
Instead say, “Thank you for trusting me.”
Or say, “It doesn't change how I feel about you,” or admit that it might change things in. ... 
Don't over‐react.