Blac Chyna Leaves Rob Kardashian ... And Takes Their Baby

Rob Kardashian says Blac Chyna left him ... and she took Dream with her.

Rob just posted a few videos showing empty rooms in his house, he says the rooms were fully furnished for Dream and King, Chyna's son with Tyga. An obviously upset Rob also toured his house in a strange string of videos showing off his Christmas decorations.

As we reported ... Chyna's Instagram was hacked earlier Saturday revealing an alleged plan to leave Rob after gaining the Kardashian name and fighting for the trademark.

Rob posted a message on his Instagram account, saying, "I loved every inch of that woman and loved everything that came with her. I truly loved Angela. I gave everything I owned for her. Didn't know I was just part of her plan. I really believed she was in love with me the way that I was with her and I am so hurt and never felt this before."

In a post on her own page, Chyna says, "I have done nothing but help & loved him from the beginning! It's Chy here i got my own!!! I was doing swell before I got with him! I got him out of Khloe's house, helped him lose all that f***ing weight for him to do nothing & gain it all back! Rob asked for all of this!"

Chyna also mentions Rob's been able to come and see Dream but hasn't.