Yeesh, really sorry to hear that mate :/ No one deserves anything like that happening to them.
I know you're in a state of shock now and don't want to drive but you really need to in about a weeks' time, behind the wheel of anything really, to get your confidence back up. It's taken me almost a full year since my accident to get my confidence back.
I know you'll mourn the loss of the machine as well, but (and it sounds trite to say this) it's best just to think of all the times you enjoyed with it.
Please get yourself seen to by a doctor as well ASAP. Adrenaline and shock means that you often miss out on injuries when you check yourself over, and the paras at the scene (if they arrived) don't really give enough of a checkover. You need to get yourself checked out to make sure there's no internal damage or trauma, as a roll is one helluva incident to go through.