Do you think it is bad if I want my friend to commit suicide just because I'm sick of talking with her for hours to keep her from doing it?
What are you sick of about talking to her?
She's depressed because of her 1-year long ex-relationship.
You shouldn't encourage someone to commit suicide. You can end up being charge with murder. Call a professional to help your friend.
No I have no desire to help her.
Don't encourage her to commit suicide, but tell her that you can no longer help and refer her to therapy. It is a terrible truth that sometimes helping people can get too hard and that's when you need to walk away, but wanting her to commit suicide is too far and you should still care about her.