Sorry to hear that.What can i say?I'll try to give you some
advice,hope it helps.You've already admitted to yourself you've got a serious problem.That's a start.Obviously you have trouble solving them alone,so it might be a good idea to get some professional help.
Try to get a steady rhythm,make sure you eat at regular times,make sure you sleep enough,and pick up school,or maybe get a job(is it possible in the UK to work at 16?).
The respect you lost will be VERY hard to get back,but show to the people you care about you try.It will be a long way back,but the sooner you start,the faster you'll be back.Talk alot,it will make it easier for other people to help you.If you've got a real friend,s/he
will forgive your mistakes(but not forget them).
I hope i don't sound like a know-it-all,i only tried to give you the best advice i could.May you have the strength to carry on,and make the future something to look forward too.
All the best
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