My friend said that she wants to commit suicide?

ok, were both 13 & shes been getting some hassle from some people for being 'emo' and 'fat' and 'ugly' but tbh, shes not ugly or fat, shes a weee bit emo, and shes not unpopular or anything, but this boy went crazy at her today, and said horrible, discusting stuff, and her familys a bit stressful right now, her uncle just went to jail for murder, her aunt was killed & her mums not been there to talk to, and she said to me that suicide was an option, but seriously, i cant live without her, she means the world, i know she doesnt actually want to, shes slit her wrist and stuff, and she says she doesnt see the point in life anymore, how can i convince her not to?