Should I use
You are granted the choice to either be my friend or my enemy.
or
You are granted the choice of either being my friend or my enemy.
?
It's for my poem and I want to double-check.
Should I use
You are granted the choice to either be my friend or my enemy.
or
You are granted the choice of either being my friend or my enemy.
?
It's for my poem and I want to double-check.
American here, I would use 'choice between' two things: "You are granted the choice between being my friend or my enemy," without the word either. Another formulation would be "You can be either my friend or my enemy." but if you want to keep the word choice then go by the first option.
Keep in mind that since this is for a creative writing piece you do have the liberty of adapting grammar rules to whatever floats your boat, whether to fit a meter or to sound jarring to capture the readers attention, etc. Grammar just becomes guideline at this point.
Good luck with your composition!