The 23-year-old actor - who portrays Kurt Hummel in the comedy drama show - took to his Instagram account to honour his friend, who was found dead in his hotel room in Vancouver, Canada, on July 13, and admits he's been remembering many of the happy times they shared on set in the wake of his shock passing.
In a message accompanying a blurry screen grab of the pair, he wrote: "I'll never forget all the laughs we shared or the faces we made after awkward interview questions. Love and miss you, buddy."
Chris posted his message shortly after a memorial was held for the 31-year-old actor at Paramount Studios in Los Angeles, which was attended by many of his co-stars including Lea Michele - Cory's girlfriend of 14 months - and the show's creator Ryan Murphy.
Jane Lynch - who portrays tough-talking Sue Sylvester in the programme - also attended the emotional service and admitted it was nice for the cast to be together in such a difficult time.
She told TMZ: "It was beautiful. And still really sad, but it was beautiful. [It was] nice to all be together again."
Earlier this month, Naya Rivera - who plays Santana Lopez in 'Glee' - said she was "deeply saddened" following the death of her co-star.
She said in a statement: "The entire 'Glee' family and I are deeply saddened by this tragedy.
"Cory was and always will be a part of my own family and a good friend. He was a special part of this world and will forever be missed."
- BANG! Showbiz