My (30F) bf (32M) threatens to leave me after every argument

My boyfriend (32M) and I (30F) have been together for some time, and I have noticed a pattern that is becoming increasingly difficult to deal with.

Whenever we have an argument..whether it is about something significant or something very minor—he resorts to threatening to end the relationship. It does not seem to matter whether I am simply expressing that something hurt me, disagreeing with him, setting a boundary, or asking him to take responsibility for something. If he feels challenged in any way, the conversation eventually turns into, “Then leave,” “I’ll leave you,” or some variation of a breakup threat.

It has reached the point where I am afraid to express myself because I know that bringing up an issue may result in him threatening to leave. I feel like I have to carefully regulate what I say and how I say it just to prevent the relationship from being put on the line.

The frustrating part is that I am not necessarily asking for anything unreasonable. I want to be able to have disagreements, express anger or hurt, and take up space in the relationship without feeling as though I am risking its existence every time.

Over time, this has made me increasingly anxious and emotionally dependent on keeping the peace. I find myself backing down even when I genuinely believe I have a valid reason to be upset, simply because I am scared of losing him.

I am beginning to wonder whether this is a normal but unhealthy conflict pattern, or whether repeatedly using the possibility of a breakup to shut down difficult conversations is a form of emotional manipulation.

Tl;dr My boyfriend threatens to break up with me during almost every disagreement, big or small, especially when I challenge him or express that something has hurt me. I’ve become afraid to speak up because I feel like any conflict could result in him leaving. Is this emotional manipulation, and how do I deal with it?