Cory Monteith's Dad Says Son 'Should Have Known Not To Touch That Drug Again'!

This is just too tragic.

As the world prepares to cry its eyes out during tonight's Glee tribute episode, one man's heart may weigh even heavier than most — Cory Monteith's estranged father, Joe Monteith.

Joe recently admitted that, among other things, he never had a proper chance to say goodbye to his son.

When Cory died in July, it had been two years since he and Joe had seen each other, and they went 11 years before that without seeing each other.

Joe says the pain he's feeling now is "just ripping my insides out and tearing me apart."

He says when they last saw each other, Cory swore he was staying clean. Unfortunately, as we now know, that didn't last.

Joe continued:

"I lost my son. He should have known not to touch that drug again… I don't want to see any parent lose a child over heroin."

Joe also said he's very nervous about watching his son's Glee tribute, which is beginning to air right now, but that he hopes the show will take the opportunity to caution others on hardcore drugs use.

So do we.

Ugh. Absolutely heartbreaking.