Hi there. Welcome to Scarleteen.
First, take a deep breath. Being gay certainly isn't the end of the world - I've survived being bi for the past four years with little to no effort.
Now, head on over to the main site and check out our Gaydar section. It has a lot of information that you may find helpful. On the boards we have two forums devoted to all things GLBT; let me link to their FAQs:
Orientation & Identity
If you're looking for something more specific try the search function. You're certainly not the only one to go through this so relax and see what you can find.