How to get out of a narcissistic relationship?

I’ve been with my boyfriend for around a year and a half. We live together. I still love him but know this relationship is not good for me, it’s been damaging on my mental health. He’s condescending, controlling, he has no empathy, he constantly threatens me.
Despite all this, I still love him. How do I get out of this? How can I leave him?

How to get out of a narcissistic relationship?
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