There are many synonyms for the phrase "let someone be." It can be used to indicate a desire to not interfere with someone's actions or decisions. Some similar phrases include "leave someone alone," "let someone do their thing," and "allow someone to be themselves." These phrases signal a desire to respect someone's autonomy and individuality. Another synonymous phrase is "give someone space," which implies a need for distance or privacy. Ultimately, these phrases all communicate a similar sentiment: to allow someone to be free to live their life in their own way. Whether it's to show respect or simply to avoid conflict, "letting someone be" is an expression of kindness and understanding.