updated 08/25/2015 AT 8:16 PM ET
•originally published 09/22/2013 AT 2:00 PM ET
“I think that grieving comes in waves,” she told PEOPLE at the Ciroq-sponsored Variety & Women in Film pre-Emmy event in Beverly Hills, Calif., on Friday. “Every day that I go to work, I walk past his trailer, and every time I look at a call sheet I see that his name is not on there. Every time I do a scene with the kids I realize that he’s not there, so you’re reminded in every moment. It’s hard, and it feels like such a waste.”
But while Lynch admits “it’s tough” as she and her castmates continue to mourn the 31-year-old – who died from a lethal combination of heroin and alcohol this past July – her heart goes out to his girlfriend and costar, Lea Michele.
“I know it’s just been brutal for her,” Lynch said at the Gallo Family Vineyards and Ciroq-sponsored event. “I never lost a boyfriend when I was 26 years old. I can’t tell her what her experience is. She’s a champion, and she is a rock star, and she is getting through this.”
The Fox show is set to pay tribute to Monteith, who played Finn Hudson, in a special episode airing next month. And after she read the script, Lynch reassured fans on Twitter that it was the “Most beautiful thing.”
“I don’t think it’s ever really over for anybody,” she admitted. “It’ll be great for the fans that we’re shining a light on this, that it happened, because I know it affected a lot of people in the country, so everybody can grieve together.”
On a lighter note, Lynch also stopped by the HBO Luxury Lounge and picked up an UPPAbaby Mesa car seat and Vista stroller for another Glee alum, Heather Morris, who’s baby is actually due Sunday!
The 65th Primetime Emmys will come to CBS Sunday, Sept. 22, at 8/7c. Come back to PEOPLE.com for complete live coverage and the best dressed stars!