I don't know if I can go on any longer?

I really don't feel like living anymore. I have no friends, no one gets me, and I'm depressed. Today was the first day of ceramics at summer school and it sucked. I couldn't even do anything because my anxiety got to me and was too shy to ask anyone anything. Meanwhile, everyone else had friends to talk to and get help from. I couldn't even ask anyone for a wire to cut the clay. I'm sooo depressed. What should I do? Life's not worth living anymore. I don't think I could ever go into that ceramics class again. Plus, I have no one to support me. I don't even trust my own mother and grandmother. I have no friends to talk this out with. It's just me, myself and my computer. I need help badly!