Using "If you want we can break up" is a threat or insecurity sign?

Everytime something a person doewnt like happens
This phrase appears. It can be lost phone call, comment about "we need to talk"Anythin that he doewnt want to confront
For me it soynds childish, because if he really wanted to break up he would do it and wouldn't text me everyday
Using "If you want we can break up" is a threat or insecurity sign?
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