My best friend is turning gay, what should i do?

my friend darren wont watch , he wont eat meat, he wont lift weights. he thinks the dude i hate is "attractive." im dating his sister. and the dude i hate is her ex. im trying to save my friend from becoming a , queer, fag, etc, but nothing i do is working! what do i do?! accepting it is NOT (underline not) an option.