The 28-year-old picked up the injury during training last week, and scans revealed that he is likely to be out for around six months.
“Since I have been here they have been great and the messages that I have received do help,” Cox told leytonorient.com.
“A lot of people may think it doesn’t help, but I see all the tweets on my commute to training and sometimes when you are a little down you go on to your social media and you do see the messages, some of which have been lovely.
“I can’t thank them enough. I have got another year left so I will still be here next year. Unfortunately I can’t be part of what I hope is going to be an up this season because that is what the club and fans deserve.”
The O’s are also without striker Paul McCallum, who picked up a similar injury in the Northampton Town game earlier in the season, and Cox admits it was nice to have someone to go who has been through a similar situation to what he is about to experience.
“Paul had the same injury and he’s a few months ahead of me, but I have had a few conversations with him about the operation itself,” he added.
“I hope the operation will be at the end of the month. It could be sooner if I pass the protocol of what I have got to do. I will have to have a few days at home to recover and then I will look forward to the recovery and getting back out there.”
Cox had hoped the injury wasn’t as bad as first feared, and while he is not able to play a part out on the pitch he hopes his team-mates can deliver.
“I am gutted for not being able to help the team so it will be an experience as I have never been out for so long,” he added.
“The results haven’t come of late that our performances have deserved, but hopefully they will start to come. I urge people to be patient with us. We have gone through a sticky spell and the boys know that and I understand the fans’ frustrations.
“We need to stick together and get through the other side and hopefully come Christmas, which is an important period with a lot of points up for grabs, we can push on and get in the top three.”
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