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I’d just end this one. You’re not getting treated with respect.

If he's better looking and she could be with him, drop her off at his house and say goodbye. Drive off and don't look back. She's disrespecting you with these comments

get rid.

Defend your self-worth, you are perfect as you are and your partner that truly cares for you will display that.

Let them all have her at the same time. Then laugh your ass off as they desperately flee, falling all over themselves.

She’s trying to sabotage your self-worth and make you emotionally dependent on her. Negging, some call it.

Sounds like you are about to be dumped. Be proactive. Tell her how she acts is inappropriate. If she continues, bounce.