What does it mean when my boyfriebd threatens to leave me everytime we have an argument or disagreement and how do I stand up to that?

Every time we have an argument or disagreement he always threatens to leave me or tell me to leave for example yesterday we got in a disagreement about social media it was so stupid and he said if you wanna leave, leave. Or if I just don't want to talk about it he says I'll leave or if you f**k up I'll leave, is he using this to get what he wants?

What does it mean when my boyfriebd threatens to leave me everytime we have an argument or disagreement and how do I stand up to that?
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