Leecamowol, the others are right here. Please don't think of suicide. The news is just sinking in and you're obviously feeling very depressed, but maybe this'll help you....
I was with a good friend of mine when he was diagnosed with HIV, so I understand how you're feeling - just as he did. Several years on, he's as fit and healthy as can be, with his condition controlled by drugs and diet, and a year ago he met his partner and they moved in together. With any luck, you can do exactly the same sweetheart. Many people who're HIV positive never go on to develop AIDS, so take a mind and body rest, and get your GP to not only prescribe some anti-depressants if necessary, but to take a break from work, even if it means loss of money. Depending on your job, you could probably leave on medical grounds and claim incapacity benefit or something in the long term, due to your stress over the condition.
It's also a good idea to have counselling - perhaps phone the Terrence Higgins Trust, who deal with not just gay people but anyone with the disease. Your hospital may also be able to put you in touch with group therapy, where you'd meet others in the same boat.
Your initial reaction's perfectly normal hun, and you'll probably have all sorts of mood swings, but don't think that this is the end and contemplate suicide. Your family, friends and counsellors/doctors'll help you to accept what you have, and with any luck you'll be able to lead a near-normal life. x