Ariana 'Feels Horrible' About Pete's Breakdown — But 'Will Not Be Guilted'

Ariana Grande rushed to try to help her ex-fiancé Pete Davidson following his disturbing suicide post Saturday, but she's now ready to back away so he can heal, RadarOnline.com has exclusively learned.

"She feels horrible and will be there for him if he needs someone to talk to, but Pete is not Ariana's responsibility anymore," a source explained.

As RadarOnline.com reported, Davidson, 25, took to Instagram on Dec. 15 and posted a disturbing message to his followers: "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," he wrote. "All I've ever tried to do was help people. Just remember I told you so."

Shortly after putting up the post, Davidson deleted it — along with his entire Instagram account.

"I'm downstairs and I'm not going anywhere if you need anyone or anything," Grande, 25, tweeted Davidson, who, it was later revealed, turned up at his Saturday Night Live gig in New York City. "I know u have everyone u need and that's not me, but I'm here too."

Now that Grande has had a little time to think about the emotional roller coaster ride Davidson was on Saturday, she's focusing on protecting herself and looking out for her own wellbeing.