Former Celebrity Big Brother winner Charlotte, 26, shocked fans last week when she walked away from the MTV show that made her famous.
She said it was partly to avoid ex-boyfriend Gaz Beadle.
Writing in his weekly column for Reveal, Bobby said: "OMG, I am so shocked to hear that Charlotte Crosby has decided to leave Geordie Shore! She was such a great character and has been on the show for so long that I think it will be a massive loss without her there.
"Saying that, though, I'm so excited to see what she goes on to do next as she always has me cracking up. She says she'll never speak about Gaz again but it's hard to say that when there's so much history – just look at Danni and Lockie."
Announcing her decision to quit on 1 June, Charlotte told fans: "I am hugely sad and it kills me to write this, I will miss Geordie Shore with all of my heart, it was my life and I love you all so much."
She later denied reports she could return for special appearances, saying: "I appreciate all the optimistic articles of me returning to @mtvgeordieshore for "Special Occasions" But sadly there's no truth in these...
"I am no longer a part of Geordie shore and have no plans in returning. It's massively devastating for me and I will miss them all. But I'm ready and MASSIVELY excited for my real life to start now. Just to clear that up from the articles that have been claiming otherwise."
But she then suggested she was having second thoughts, telling fans: "When you realise you made what seems like the worst decision of your life. I've lost my family… and my life. Cast and CREW."
Geordie Shore's 13th series is currently filming in Magaluf.
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