keep (yourself) to (yourself)
if you keep yourself to yourself, you live a quiet life and avoid doing things with or talking to other people.
We don't know anything about her, she keeps herself to herself.
英语词组固定搭配大全包含18674条英汉双解词组，基本涵盖了全部常用英文词组、短语的翻译及用法，是英语学习的有利工具。