An emotional X-Pac took the stage at Chyna's memorial last night and apologized to his ex-girlfriend for "not taking better care of you" ... while revealing he loved her until the day she died.
"Joanie and I had a really rocky relationship," X-Pac said ... ""Until the day she died, I loved her very much, I really did."
X-Pac (real name Sean Waltman) and Chyna began dating in 2003 and reportedly broke up in 2005 -- but clearly, X-Pac still card about her.
"I hope you forgive me for not taking better care of you .