How do I make my friend talk to me!!!!!!?

My best friend of over 8 years stopped talking to me about six months ago. We were best friends in the late years of elementary school and most of high school. I had to move to a different state because of my dad's job, but we kept in touch for three years. In October she just stopped talking to me. I thought maybe she was busy so I just send her a text every so often, but now she won't answer them at all. I call and she won't answer, I email her and she never replies. Last August she called me and said she moved to a different neighborhood but still lives in the same town. I miss her so much!!! I've tried calling her parents' cell phones and her house phone and she won't pick up. I tried to call one of our old friends we used to hang out with back in middle school but she didn't answer her phone either. I would all be willing to go see her this weekend but I don't know her new address! I'm sick with lonliness and frustration. Why won't she talk to me!!! We had so much fun and such good times when we used to hang out with each other. The only reason I can think of that she doesn't want to be my friend anymore is that I was diagnosed with major depression and I said some things I probably shouldn't have but I apologized and she said it was okay and that was it. Damnit I miss her! I miss all the old tv shows we used to watch and laugh at, and the crazy things we would get into. She was like the only person I ever knew that actually cared about me. What can I do!!!????