I don’t envy you believer. That’s a tough situation.
How about telling her that you think she is still a good person (leave out the bad choices thing) and it’s hard for you not to be friends, but you are scared of getting influenced or something like that. WHATEVER YOU DO, DO NOT TELL HER IT’S CUZ IT’LL RUIN YOUR REPUTATION!!! That would totally not be good!!!
Ask her what to do about it? Like I still want to be friends with you but when you do x, y, z it bothers me…(choose what you like) so what can we do about it.
Good Luck!!!!!
Appropriate use of all-caps. very good.