Just so you dont feel like the only one out there not able to ride, I was up in cairns back in late may riding cable and got a little excited going off one of the kickers and when i landed had a full blow out. I tore both cartlidges and fully ruptured my ACL and MCL along with bone fractures of my tib and also fractured my pattella

I've had to wait for the swelling to ease and pattella to heal before they would do surgery and after my last MRI they discoverd i will also need bone removed due to cyst like structure inside the joint and this was my good knee. I'm know booked in for major surgery in early august and have also been told 12 months if not longer. One thing my physio has told me is the stronger your knee is before surgery the quicker recovery time will be so i've been doing as much as i can to build up muscle by walking and swimming (according to pain) and trying to keep positive by still going down and watching and helping others out. As much as it sucks to see everyone out having fun sometimes you still get a buzz out of helping others progress.
But if i can give you one bit of advice make sure you get your Mri read by an experienced ortho surgeon and they find out everthing that is wrong because its very easy for them to miss things. i had two done and both were very differnt, i also researched it on the net and found a local specialist who worked for a well known AFL club.
If you have private cover there is the option of LARS surgery but this is more of a temp fix rather then long term and it involves using synthetic ligaments rather then ones from your hamstring, the recovery time is much shorter but is not recommended for everyone.