My dm died a year ago, and I'm yet to feel devastated.
I would say we had a fairly close relationship, we saw a lot of each other but I found her quite overbearing at times. She wasn't that elderly when she died, and had been ill for a while so it wasn't a shock.
I just feel like I expected it, it happened and I moved on. I read about other people losing a parent and they seem to grieve so intensely - a close friend of mine lost her dm six years ago and still talks about it all the time, how much she misses her etc.
Am I vaguely normal or just totally heartless?