Death/Grief/Breakup

My gf of a year broke up with me due to the grief of her father’s passing. He passed 6 months ago. She is struggling immensely, clearly in the throws of grief: lacking energy, constant brain fog, sadness, etc. She told me she didn’t have the emotional bandwidth for a relationship right now, and didn’t want to be the source of my sadness because of her absence in our relationship. I understood. We both cried and are saddened. I asked her that when she’s feeling better, would she let me take her out on a date to a previous spot of ours. She referenced an inside joke about the place and agreed.

I guess what I’d like to know, is how long does the worst of grief last? When does one come out of the fog and begin to expand their life again? When might I hope to see her again? Is there even a chance of seeing her again…?

Have others experienced a similar breakup?