Can low confidence and monotone conversation increase breakup risk?

I was watching a social media star online who got dumped after confirming her romance and she seemed extremely subdued and monotone in dialogue. It might be due to harsh disciplinarians when she was growing up, but I just thought, most men would not be attracted to that long term. Her appearance was gorgeous, but she had no confidence or courage.

Can low confidence and monotone conversation increase breakup risk?
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