Did anyone think this was going to last in the first place?!

Rob Kardashian and Blac Chyna have broken up yet again, but it sounds like it might be for good this time around, People reports. "They split a while ago. The wedding plans are off. They are both trying to be mature about it. It was less dramatic this time," a source dished to the mag.

So what was the straw that broke the camel's back? The sock designer's battle with mental health, apparently.

"Chyna is super fed up with Rob and thinks he is way too emotional and depressed. She thinks he has terrible issues. He is always battling his own insecurities and is unstable. It’s a major turn-off to her, and she thinks it’s incredibly unhealthy for the baby and their family," the insider revealed.

"They’re living separately and she’s keeping Rob at arm’s length, both from the baby and from her," the source added. Let the custody battle begin!

The former stripper seems to be already be moving on, as we caught her out to lunch last week with Jamel Davenport, the same guy she was caught getting a little too cozy with at a Super Bowl party earlier this month.

We hope he snatched that engagement ring back and ran to his lawyer's office!