Yes. It was awful and still hurts a lot, ten years later.
We met at nursery school aged 3. Age 10, we were sat next to each other by a teacher and became firm friends. We were like sisters from age 10 for the next thirty years. Age 40, my mum died and I never heard from my friend again, off her own back. I would get in touch, she'd reluctantly reply quite some time later, and then I'd never get another reply. After 18 months of this, I confronted her, told her how I felt, and I got the famous non-apology apology, "I'm sorry you feel that way." At that point, I really lost my temper.
Looking back, there were signs that she'd become increasingly odd over the years, but I never thought she'd do to me what she did. She made losing my mum ten times harder, and it absolutely shook my faith in friendship and in human nature. I still think of her, and although I have no regrets about not being friends with the person she turned out to be, I think I will always be really sad that things turned out the way they did, that she couldn't be a better person. We were so close for so many years. I'd known her for 37 years, and I don't think I will ever truly get over the loss. But I could never, ever trust her again.
So yeah, losing a lifelong female friend is really, really hard, but sadly, that's life sometimes.
Something I've found healing is to be grateful for the good times and the thirty years of great friendship that I did have with her. I have a beautiful silver and amethyst necklace from her that she gave me for my thirtieth birthday, and although I was tempted to get rid of it, I didn't. I'm keeping it as a reminder of what we had. I was lucky to have such a close friend for so long. I'm not sure that I will ever be able to wear the necklace, but I will always keep it.