CONTENT WARNING: This article deals with mental health. If you are contemplating suicide or having suicidal thoughts, please call Lifeline on 13 11 14, or the Suicide Call Back Service on 1300 659 467. If you are in immediate danger, call 000.

Celebrity psychologist and addiction specialist Dr. Drew Pinsky — more commonly known as Dr. Drew — says that Ariana Grande needs to “stay away” from her ex-fiancé Pete Davidson in an effort to protect his mental health.

The Celebrity Rehab star, who it must be noted is not Davidson’s psychologist, shared his views with TMZ after Davidson made a concerning post on Instagram last Saturday (US time), which read: “i really don’t want to be on this earth anymore. i’m doing my best to stay here for you but i actually don’t know how much longer i can last.”

It was reported that Grande rushed to the set of Saturday Night Live after Davidson uploaded the post, but he refused to let her in. The pair split in October after a whirlwind romance and engagement.

While Dr. Drew says he understands why Grande wanted to be with her former partner at that time, but believes that Davidson needs space.

It’s nice for Ariana to express her love and support of him, [but] she needs to stay away. This [split] is a major loss. He needs to manage that loss and every time he comes in contact with her, that clock starts ticking again – it just resets. All those fantasies of reconciliation return and it’s bad.

Dr. Drew added: “I said it when the breakup first happened, his safety is at risk. This is a very serious problem. On top of all that, poor Pete is dealing with … getting trolled online. And when you’re unstable like that, it just cuts right through you.”

The celeb shrink points out that Davidson’s “self-identified” borderline personality disorder and the trauma of losing his firefighter father Scott, who died during the 9/11 terrorist attacks, put him at risk.

[Borderline personality disorder] can feel very emotionally dysregulated and often self-destructive — typically self-destructive. He’s had previous mood disturbances, so he’s at risk for depression reoccurring… [he’ll] be OK, but he’s gotta make it through this.

NYPD conducted a wellness check after Davidson’s disturbing Instagram post and declared him “accounted for”. Davidson has since deleted his Instagram account.