Sounds like the MentalHealth.gov link at the bottom of the forums could do you some good. Also, high school isn't the be all and end all of life (I'm assuming that is what the exams are for).
Yes. Welcome to the madhouse! I would definitely recommend therapy. I have/had similar problems, and therapy helps me a lot. I'm not even close to "normal" because of it, but it helps to have a non-judgemental person to talk to, that can understand what you are going through, and how you think. If you can find a good therapist, and are honest and open about what's going on, they can help you out a lot. There's nothing wrong with having a problem.
This + 1000. I've had friends and relatives in your situation, and much as they couldn't believe it would help, it did. Go talk to a therapist. That is not something you can do on your own, nor with only the help of friends and relatives.
Ive suffered with depression for way way to long, for starters stop drinking it doesnt help it just covers the symptoms and in alot of cases can make it worse, the advice in seeing someone is good advice, if you can get it early you have a better chance, the longer depression goes the more it reinforces its self, but recognising that you are depressed is good its easy just to get swallowed by it and do nothing, but get some counselling, also finding something you like to do that occupys your mind helps as well.
Have you tried working out or taking jogs in the nature? It's proven that it helps people who are depressed, or anyone in general actually.
My oldest brother used to struggle with depression and the best advice is truly to talk to someone who can help. Whatever you end up doing though just try to avoid doing nothing or using booze or drugs specifically to tone down your feelings. This is something that is hard to deal with but has to be dealt with up front. Not through avoidance.
I had four years of therapy after coming home in '08.
I was in a very bad place, made more so because I had a beautiful boy who thinks I'm super-dad, and I wasn't sure my condition wouldn't screw him up at some point.
I would stare down the barrel of my sidearm every night after logging off of this very forum, and then put it away.
I'm in a better place now, with a loving wife, and a rapidly growing son who -still- thinks I'm super-dad..
..although being eight now, he also calls me butthead regularly.. yeah, whatcha gonna do?
All I can say is that everything always changes, it's the only constant this effing universe knows or cares about and it's all we can use to move through the crappy darkness, and into the sunlight of better times.
I hope you can take any of this -as well as what the others have said, and somehow find a bolthole (mentally) to whether it out.
Take care dude, because everyone's worth that care that they take from life.
My family I feel I couldn't talk to as I don't feel very close to them and have come to despise them.
Thank you to all those who have commented. Your words have convinced me to give a letter, in person, to the teacher that asked me if I wanted counselling. This is in order to present exactly what I'm going through, sparing no detail other than a few names.
I've also decided to present this to the girl, as I feel I need to explain considering I may have scared her.
Perhaps I should try to sleep now.