keep to yourself
US /kiːp tə jərˈself/
UK /kiːp tə jərˈself/

1.
tenersi per sé, essere riservato
to remain private and not share personal information or feelings with others
:
•
She tends to keep to herself and doesn't socialize much.
Tende a tenersi per sé e non socializza molto.
•
It's better to keep to yourself if you don't want to get involved in office gossip.
È meglio tenersi per sé se non vuoi essere coinvolto nei pettegolezzi d'ufficio.