Most Helpful Girl
Just break up with her like you would a romantic relationship. Lol
Our friendship has run its course, we're no longer in the same place. I appreciate all the hard times you've seen me through but this friendship is no longer beneficial to me, we have different views and priorities, I think it's time we go out separate ways.
This will likely get you blasted by her though. So you can go that route or you can just keep "forgetting" to respond to her messages or return her calls until she stops trying.