Should i or not????girls only please?

i have this friend she is 24 yrs old and she has been really depressed lately and she has been talkn about ending it all and everytime i talk her outta it she gets mad at me for some reason and tells me to mind my own business.she has told me she was gonna take some pills and hope into a dumpster and let them take her to the dump so no one will find her.im tired of getting yelled at by her when i offer my help so should i let her go or not.she was caught by me one time in a dumpster and she was drunker then drunk and luckily when i went to her house i parked by the dumpster and when i got out i heard her sobbing,yes its wierd but also a lil sad and frustrating.right now she is not talkn to me or answering my calls and i WILL NOT call the police cause its none of their buisness.so what should i do let her go the way she wants or keep helping?