[ One corner of his lips twitches upward in a sort of... wry smirk of sorts. ]

As far as I know, I wouldn't.

[ Mmm... he's very, very hesitant, but letting out this bit isn't even a matter of opening up; it's just a matter of fact. ]

I don't want to know what could have gone differently.

[ He doesn't want even a chance at finding out the kind of person he was before he lost his memories, and so he hates the part of him that does want to know.

He doesn't want to know why nobody wanted him. He doesn't want to know what he did to deserve losing those memories ten years ago. He doesn't want to know what happened to his parents, because he knows it can only be bad - he hates that part of himself, because what if they deserve to have it known? What if they didn't just throw him away, after all...?

Or what if he... chased them away, considering how terrible he is? ]

Some things are better left unknown.