My boyfriend is depressed and want to die. what to do?

Before one month, few guys tried to rape me, I called my boyfriend and he came to my help, he is a strong fighter who knows few martial arts , and he knocked them out, but one guy pulled a gun and shot him in the back. my boyfriend became completely paralyzed.
he has no parents , no family, only me and he worked , made food by himself, shopping by himself cleaning the house, training in gym , train in few martial arts, , he was completely independent and now he can't even shower himself,

he can only talk… and he became very depressed , he seems very sad, and he feel shamed that he needs me to get a shower…. He keep telling me that if he could move he was going to suicide and because he can't its my duty to finish him off. He asked me to hug him tightly andhe wanted to his head to be on my chest and then he told me how I can kill him instantly from this posture by breaking his neck…

what can I do, how can I make him want to live?

My boyfriend is depressed and want to die. what to do?
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