Pete Davidson has secretly checked back into rehab after his brutal break-up from Outer Banks star Madelyn Cline. The comedian was said to be teetering on the brink of a nervous breakdown and felt he had no choice but to check himself into a psychiatric facility in hopes of getting sober, RadarOnline.com can reveal. Sources claim since his break-up with Cline in July, Davidson, 30, has displayed increasingly unpredictable and erratic behavior. One insider revealed: “Pete took the break-up very hard. “For just a blink of an eye, he may have thought she was the one. They burned so brightly toget…
