Famous somebody is acting wrong etc. "Don't embarrass who loves you."
Would you say that? Or what would you say?

Question

Famous somebody is acting wrong etc.  "Don't embarrass who loves you."   
Would you say that? Or what would you say?

Answer

'Don't embarrass the people who love you.'   If it is a famous person, use the plural, because many people love them.

If it's a close friend: 'don't embarrass the person who loves you,' OR  'don't embarrass the one who loves you.'