Paolo, I don't know how the others feel about your post and request for help but I have to admit that I feel honored and proud that you've chosen
us to provide some sort of comfort and to help you out of this dilemma.
First at all, let me say that I'm glad you're OK. Regarding the other guy, I don't really know what to say, I don't know him and if you really feel the accident wasn't your fault, RELAX and don't worry too much. It speaks for your character and personality that you care about the other person, even if you seem to be pretty sure it wasn't your fault. But let me tell you something: a motorcycle could easily kill you in your car, if he hits you in the "right" spot and pushes you off the street on the impact. So maybe you should ask yourself something else: maybe this guy almost killed YOU and you were lucky?!
I would also start to write down what you remember about this accident because after a good sleep and maybe a few days, you may actually forget about important points which may save your butt and prove your innocence.
Try to analyze the accident in your imagination, try to think about the last moment before the impact and what you were doing. Try to remember the surroundings of the car at that time, especially DETAILS. Because you may end up with a witness which says that it was your fault and you can't remember details which would make the witness to re-consider his statement or even prove that he must be wrong.
So think more about YOU and the accident and how it happened, think less about the guy who has been badly injured because in the end, you can't do anything for him.
If you're 100% sure it wasn't your fault, STOP thinking about him. You could be dead by now...caused by HIM. I know it may not be nice to say that about somebody who is in the hospital and may not survive but a fact is a fact and people have to pay for their mistakes in a way or another.
So again: if it wasn't your fault, you DID NOT destroy that man's life, this is pure BS!!! As an adult I'm responsible for my own actions and if I do something stupid, nobody else is to blame for it. Period.
Paulo, dear friend and fellow internet "comrade": try to not stay alone over the next few days, stop thinking about the victim and think about more about the accident and how it happened. You'll gonna need this sooner or later, especially if that guy dies and the authoroties start an investigation. Be prepared and try to keep a clear mind: write down the details of the accident you remember, especially if they prove that you're innocent. Because like I said, in a few days when you're going to need to know those details, you won't remember them anymore.
Good luck, safe motoring and try to see it this way: you could be in the same situation now, lying in a hospital, getting emergency treatment. Relax, the worst part is over.
Keep in mind that 2-wheeler's are intrinsically vulnerable in accidents with 4-wheeler's-why I don't ride a 2-wheeler. And your guilt feeling is a normal (healthy) reaction to such an event, even when you are not culpable (I'm allowed to say this-I'm a neurologist). All the above advice (legal and social) is good. Your remorse will feel less intense the further away you get from the event: "Tincture of time."
