How do I work up the courage to leave

I have to leave hes going to end my life eventually I know he will

I’m just so attached and in love it feels like all the terrible things hes told me are true and I don’t want to be with anyone but him Im stuck on all the good memories

Please I know I have to leave him i just don’t have the willpower to hes hurt me in every way possible i need some motivation anything I feel so pathetic

We keep going back to each other I hate this everything was so good for like 2 months now it’s worse then ever