Well first off, you are brave because you want to get help instead of doing something to hurt yourself. I know exactly how you feel, I've been going through the same thing since around your age and even before, I know telling your parents can be difficult because they dont get why you just arent happy or why you dont have friends. I wish I wouldve told my parents about my problems then instead of letting them know by being in a coma for 2 and a half weeks(you don't want that) Having them read this question would be a great idea, or write them a letter and leave it for them to read while you're at school or something so they have some time to think it over, things like this are very stressful for parents, they love you and dont want you to be sad. I also have similar death obsessions, you may think "what would they think if I died?" but if you were dead you wouldnt know the answer to any of those questions. And as far as cutting yourself goes, please please stop, I have 4 very distinct scars on my right arms and many faints ones, I do everything in my power so that people can't see, but they always do and I know their first thoughts are that I'm a freak and I cut myself. I gave myself these scars when I was 16 and they are here to stay, they have given me a label that no one should have.
I admire your courage to reach out to your parents, just remember that so many people have been in your shoes and live to tell about it. You have so much to live for, this is just a bump in the road. You may think people at school dont want to talk to you, but you should consider the way you act, maybe they think you dont want them to talk to you. Its very hard to act happy when you arent, so forget about them for a while and worry just about yourself, the friends will come later. You are not a freak, your parents wont think you were a freak, and anyone who has had any life experience will not think you're a freak. Talk to your parents and dont let them interrupt you until youre finished, you obviously know what you need so show them that you are confident in your decision that you cant do this alone, you have nowhere to go but up from here.