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Kris Humphries' family has been crushed by Kim Kardashian's decision to end their marriage -- telling friends, the reality star is making a massive "mistake" for giving up on Kris so soon.

Sources close to Kris' family tell TMZ, everyone knew there was tension in the relationship -- but they never imagined divorce was on the table. As one source put it, "Everyone fights."

The Humphries believe Kim is making a huge "mistake" -- insisting she never gave the marriage a fighting chance ... and should have tried harder to make things work.

That said, Kris' fam still believes he can salvage his marriage and talk Kim down off the ledge, convincing her to slam the brakes on divorce proceedings.

According to sources, Kris' family loves Kim and they're hoping beyond hope the divorce doesn't go through -- particularly because "it would kill Kris" if it was really the end.

Zooey Deschanel is going from "New Girl" to single girl -- she and her rock star husband Ben Gibbard have separated ... Zooey's rep tells TMZ.

The split was "mutual and amicable" and there was "no third party involved" ... according to US Weekly.

Deschanel and Gibbard -- lead singer for the band Death Cab for Cutie -- were married in 2009.