I have to confess, I've been reading this (reread the whole thing) and wondering where the line is between "minimizing" and "invalidating" and standing back and not calling BS when someone, on the one hand, seems to be looking for help and, on the other, is holding on to a distorted version of reality for all they're worth. I was also looking for evidence that you've sort help through therapy and all I found was a reference to a T telling you you had PTSD.
So, you had a horrible accident and now have a horrible scar. You are disfigured, then, on the level of the burn survivors we see now and then, face a swirl of scar tissue, no ears, missing parts of fingers, that sort of thing. The kind of face that makes small children scream and little old ladies gasp. I'm truly sorry about that. That would be rough. Not to mention the physical pain that goes in to surviving that sort of thing. And, your life before was perfect. You were attractive, athletic, life of the party, world going your way. And that's, of course, what you wanted and what you deserve? For you, life is an all or none thing, I take it. You get your perfect life in your perfect body or you don't want anything at all?
How you deal with this is a choice. You didn't chose the scar. But how you deal with it is 100% up to you. People have offered a lot of suggestions and encouragement. You have chosen to reject that. Your choice. It honestly makes me angry to think that there are people dying difficult deaths every day who would CHOOSE to live with your scar, if they could only live and you think you're too special to go through life with a disfigurement when you have the opportunity. It sounds like you have family and friends who care about you and love you. They probably would rather you choose to suck it up, deal with this, and stay in their lives. There are people in this world who've never known that who'd gladly take on the scar for the opportunity, if they could. But, of course, they don't have that choice.
I don't know where I'm going with this, other than to vent some frustration with your unbelievably shallow belief system. I guess if you can only find value in life in a perfect body, and you have no interest in learning how to live with what you've got, maybe suicide makes sense. Either you don't think you have anything else to offer the world or you really don't CARE what you might have to offer? Your choice. I seriously doubt you'll convince an organization that you scar is worth dying for so they'd help you do it. But you can definitely spend the rest of your life wallowing in self pity if you want to. You're off to a great start.