reticent

Inclined to keep one’s thoughts, feelings, and personal affairs to oneself. synonym: laconic.

Restrained or reserved.

Reluctant; unwilling.

Disposed to be silent; reserved; not apt to speak about or reveal any matters: as, he is very reticent about his affairs.

Inclined to keep silent; reserved; uncommunicative.

Keeping one’s thoughts and opinions to oneself; reserved or restrained.

reluctant to draw attention to yourself

temperamentally disinclined to talk

cool and formal in manner