KRIS HUMPRIES;;;;;WHEN I KNEW KIM WAS UNFAITHFUL TO ME

Kris Humphries told his ex, Myla Sinanaj ... he knew Kim Kardashian hooked up with Kanye West as he was surprisingly absent from the big wedding ... .

We're told Chris groused to Myla about how Kris Jenner suspiciously referred to Kanye as "a close family friend" -- someone Kim knew for a long time.  Kris H told Myla, "If he was such a close family friend, why wasn't he invited to the wedding?"

We're told Kris confided in Myla he "felt played" by the whole thing and was genuinely devastated when news of Kim's new relationship broke.

Kris was with Myla the day Kanye's song about dating Kim (and dissing Kris) was released -- and Kris was "visibly upset."