What does it mean when a girl threatens to breakup and says she needs to work on herself?

So usually if we disagree on something she will throw a fit get upset say I’m disappointing her then she will say she wants to break up and say that she needs to work on herself. If I completely go along with what she wants to do none of this happens

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Also wanted to say there’s no mention on working on herself when things are going well in the relationship even though there’s still present issues. It’s not one sided either I tell her look like have been very transparent with my issues and struggles and I want to get help with them to be a better version of myself. Cause I told her how can we say we have truly committed to this relationship if we aren’t giving each other the best version possible
What does it mean when a girl threatens to breakup and says she needs to work on herself?
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