Most Helpful Girl
Would say with the intense emotion of her dad suddenly being close to dying she has no space in her mind or heart to focus on romance right now. She may be numb and/or needing to concentrate solely on these last few months with her father.
I can imagine how hard it is for you to do this, but can you put aside your feelings for a bit and do what will help her - actively be her friend, don't ask for anything more. If you can support her selflessly it will show her how much you care, and there's a good chance her feelings for you will resurface in a few months' time.