The 27-year-old actress is upset at claims there was a rift between herself and the other stars of the show after she failed to appear in last month's special Cory Monteith tribute episode, and admits it has made dealing with the death of her co-star even more difficult.
Dianna - who played Quinn Fabray on the show - told Ireland's Independent newspaper: "Bad news spreads faster than anything good. And I think it's just such a shame, especially involving someone that we love so much, that the good old internet has taken everything that they want to say about it and spread it like wildfire.
"So I've nothing but love for that show and everybody involved in it and it was such a huge part of my life, so I think it's equally hard when I'm not there every day anymore, I don't see all of them every day anymore to have things like this fly around. It's more heartbreaking than it would be if I was there with everybody. It makes me feel even farther away from our show."
Dianna admits working on the show will always be "special" to her as she and her co-stars have learned so much from one another.
She said: "With those people it was the perfect mix of everything I needed to prepare me for everything else. We cut our teeth on that show, and it's always going to be so special because of that."