Don't want to be on earth: Ariana's ex-fiancé writes on Instagram

American singer Ariana Grande's ex-fiancé, comedian Pete Davidson on Saturday wrote 'I really don't want to be on this earth anymore' on Instagram before deleting his account. His post came after Ariana joked about Kanye West's tweets discussing mental health. Davidson had spoken about mental health in the past, and recently released a statement addressing bullying and Borderline Personality Disorder.