[DanTheMan :P]

Hey
First things first, good job on seeking help somewhere, even here. TeenHelp is a great place to go as there are so many other people going through the same thing to help you

Secondly, could you ever seek professional help? A counsellor would really help you get through any problems in a healthier way.

Try to isolate the things that trigger you and avoid them. You said whenever you get angry or upset you self harm. Whenever you are in a situation that begins to annoy or upset you, try to walk away.

However, when you do feel like self harming, try some of the aalternatives here: http://www.teenhelp.org/forums/f12-s...ves-self-harm/
For example, I keep an elastic band with me wherever I go in case I get triggered. Another useful method is to write the name of someone you care about a lot, and would be upset if they found out, where you want to self harm. It reminds you of how they would feel, and it can also be quite off putting self harming over their name.

If you ever needed someone to talk to, feel free to message me at any time
Good luck!

-Dan