Comedian Pete Davidson has spoken out against the treatment he has received online and in person, saying "it truly is mind-boggling".

The Saturday Night Live star, who recently split from fiancée Ariana Grande, posted an emotional message on Instagram in which he described being bullied on social media and in public.

He said he is struggling to understand "how when something happens to a guy the whole entire world just trashes him".

Pete Davidson, who split from Ariana Grande in October, opens up on bullying

He also referred to the fact he has previously spoken about suffering from borderline personality disorder.

"I've kept my mouth shut," he wrote on Instagram.

"Never mentioned any names, never said a word about anyone or anything.

"I'm trying to understand how when something happens to a guy the whole entire world just trashes him without any facts or frame of reference.

"Especially in today's climate where everyone loves to be offended and upset it truly is mind-boggling.

"I've been getting online bullied and in public by people for 9 months.

"I've spoken about BPD and being suicidal publicly only in the hopes that it will help bring awareness and help kids like myself who don't want to be on this earth.

"I just want you guys to know. No matter how hard the internet or anyone tries to make me kill myself. I won't. I'm upset I even have to say this."

He concluded the message by saying: "To all those holding me down and seeing this for what it is - I see you and I love you. Pete."

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Davidson and Grande's engagement was confirmed in June this year but in October it was reported that they had broken up

If you have been affected by any of the issues raised in this story you can contact Pieta House 24/7 Helpline 1800 247 247 or the Samaritans Helpline 116 123.