kidnap him
proceed to reveal that he is not human, just an artificial soul created from 2,383 lines of code
when the above don’t seem to make him like you, reveal that you murdered his friends
when he gets mad at you, repeat that he is not human and that his friends were lying to him
when he is still unconvinced, tell him you will kill every human that matters to him
for a dramatic exit, unleash hell on your brother for 0.3 seconds