I know exactly how you feel, as I have recently been through the same thing. It had been going on for about 9 months, and sometimes I felt really low, sometimes things seemed better, but I would then feel bad soon after, my emotions were up and down. I didn't feel lie socialising, but then felt lonely when friends became more distant. It is a downwards spiral, and is sohard to get out of. Now I feel happier in myself, and I haven't had any drugs or really talked to anyone, just somehow distracted myself from the situation. I'm still not as I was before, and have quite low self-esteem, but I can now see that I have a future, it's not a black hole. Perhaps some people do need some form of help, and I cannto guarantee that you will feel better immediately, but talking to others really helps. If you need to talk, post here anonymously and I will do my best to help you. Perhaps there are other people here who can also help.