Yeah, I don't have anything to add, I think your feelings run deeper, your reaction is over the top, speak to a counselor or Chaplin or what ever is available to you
My first best friend for 20 years brutally abandoned me, my new best friend of 5 years lives so far away now....sometimes I just feel so lonely without either of them being there anymore.
There's so much I'd like to say but no point really. Shit happens. Bad shit happens more than the good. The ratio is 100:1. So we just have to accept that and move on. Some ppl are not meant to stay in our life forever.