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

1.
mantenerse a sí mismo, ser reservado
to remain private and not share personal information or feelings with others
:
•
She tends to keep to herself and doesn't socialize much.
Ella tiende a mantenerse a sí misma y no socializa mucho.
•
It's better to keep to yourself if you don't want to get involved in office gossip.
Es mejor mantenerse al margen si no quieres involucrarte en chismes de oficina.