Future -- Blac Chyna Who? I'm Single!!!

Blac Chyna clearly made one of the rashest decisions in dating history, because Future not only says he's single ... he's insinuating he was never even banging her!

The rapper just posted a clear message, "Single and focusing on what makes me happy." What's amazing about this ... less than 2 weeks after they supposedly started dating, Chyna inked his name on her hand. The swelling hasn't even gone away and they're now history.

In fact, they may never have even been together if you believe Future, who also posted, "U kno I dnt f*** wit no rumors."

She shoulda gone to Amber's Slut Walk after all.