if you don't have electric in the shed, then remove the battery and bring it inside. put some stabil in the fuel tank, and if you've got a few miles on the oil, go ahead and change it. then next year, make a new years resolution to ride more....
You need to have your bike sitting on plywood or a carpet remnant or something to keep the tires from contacting the cement. Quickest way to get dry rot.
Let's (you) face it. You probably need another hobby. Left setting, probably things are going to screw up and louse up your ride when you use it.
And it is quite dangerous to ride like that Riding skills get rusty.