feminine mannerisms

hi
Iam having a 91/2 year old son. He is a very polite, well mannered , hard working and shy feeling, very obedient boy. Everybody says that I am blessed with having him as my kid.

But iam very much worried about his mannerisms. He likes to make girls as his friends, he does plays with boys also, but mostly he prefers girls & in his class as well. He shows interest in girl things but does not prefer to wear them & slightly imitate(for Eg-while talking & postures) like girls if we are not observing him.

We are having a doubt that if he is suffering from gender dysphoria. But he is showing the symptoms of puberty like growing of mustache, acne.

Is there any treatment for this & should we consult a psychiatrist or endocrinologist? Kindly suggest & help us.