I am very sorry for all you have been through.
It's not always possible to understand why some people do the things they choose to do. Parting ways with a friend, after great devotion, and without some closure, can be very painful.
Your grief isn't "fake" (as you have written), it is very real.
It will take time to work through your grief.
Please take very good care of yourself during this very challenging time.

WC