<human>: Every time my bf and I argue he threatens me in some way. Not physically but more emotionally. He generally threatens to take something away from me.

Ex: If we get into an argument that gets heated he'll say he's "done" that he wants to leave me and move out or say something like "I don't think I want to be with you anymore."

In a way I can understand where he's coming from. If things are heated he means he wants to get away from the situation surrounding me, and that when we get into a particularly awful argument its hard not to think about leaving. On the flipside, I've never said anything like this to him.

Another example, before we moved in together (literally weeks before) he got mad at me at a party for contrived slight and said he "didn't think we should live together anymore."

Other not as severe examples:
He asked me to join a phone plan, but on the way there we get into an argument. He says he no longer wants to join the phone plan with me.

Once I asked him about girls on instagram (I am not a jealous or accusatory person, asking him this in the past has literally never been an issue,), he deletes his instagram that was full of photos of us.

If he gets frustrated with things he'll say "I'm never going to do that again" or "I'll never talk again."

In (almost) all cases he apologizes and I know he doesn't mean it, but because this has been happening so frequently, I'm starting to lose trust in that. How do I express to him how painful it is for me to hear this and how it's really damaging my confidence in the relationship without causing an argument?

Can you summarize the given text in a few sentences?
<bot>: BF threatens to breakup (among other things) when fighting. What to know how to get him to stop without causing an uproar.