Miraculously my friend has returned. I just came in today, reloaded my desktop spotify on my iMac and noticed a shared song from my once missing friend. This wasn't too shocking because she was still able to send to me back and forth on the desktop. But as soon as I looked at my app today she was back.
Seems like there is no fix just a glitch that works itself out when it feels like it. I hope they will find the bug and put out an update to keep it from coming back soon.