ask her first why she wanted to do that and if she is going to tell you why, by then you can start giving her advices you just need to explain to her that doing those things will not help her or it is not the solutions to her problems. and they are correct, if your friend is still under her sanity, she will not dare do that because she knows for herself that it will not do her any good. say what you have/need to say and do what you have/need to do. pero reminder lang sis, talk to her or give her advice in a nice way not yung parang galit ka or pinapakita mo talaga na maling-mali siya, although we know mali talaga, you don't know need to show that to her kasi lalo siya maprepressure o baka hindi siya makinig. remember sis, kahit na bestfriend pa tayo, kung ayaw talaga niyang makinig, wala na tayo magagawa. she still have her own choice or decision because that is her life, hindi natin siya mapilit kung ayaw niya, just show her that you are always there for her and if ayaw niya makinig talaga, bahala siya, atleast you know within yourself you had done your part and you made her feel that you are concerned about her. in that way, marerealize niya na tama ka and malay mo mag-iba pananaw niya o di kaya kulang lang siya sa pansin at kelangan lang niya ng attention so nabigay mo na iyon sa kanya.