Learn what "i'm not sure" means, when people say it, and how to use it naturally in English.

It means the speaker thinks work and romance or fun should stay separate.
From Echoes Of Vengeance, Episode 2
The speaker says they are uneasy about mixing work and personal pleasure.
Use this when you want to say that work and personal relationships should not overlap. It is polite and common in professional or cautious relationship talk.
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