old best friend

It feels really wierd that I miss a best friend from 8th grade like I'm 18 now going to graduate soon. She was like my first real best friend was always there for me pushed me to do my best and so did I. And then there was a time were I stopped talking to her due to anxiety and depression. I called her one time like a year later after what I was going through to see how she was doing /catch up but she never called me back and we never arranged to meet so we just disconnected completely. I want that friendship back but talking to her now feels like talking to a stranger like people change she might not be the same person I knew before.I don't know how / if we're ever going to be close again. Any advice please ?