1) Don't be meddling.
你不必多事。
2) Mind your own business.
你不要多管闲事。
3) You needn't be alarmed.
你不必担忧。
4) You may spare yourself the trouble.
你不必费神。
5) You don't have to go now.
你不必去了。
6) Why should you be so suspicious?
你何必多疑？
参考词条