Better be alone than in ill company.
Solitude is better than ill company.
Keep one's distance.
Keep oneself to oneself.
eg:When making friends,you better remember that it is better alone than in ill company.
中英俚語俗語來源:孟子·盡心上:“窮則獨善其身,達則兼善天下。”
反義詞:于世沉浮 To drift with the stream.