There are a lot of possibilities. Could be you bff could be overwhelmed herself and can't reach out right now. Sounds like she is under a lot of stress and even though you have been there for her, she may not have your strength.

As far as you dad, do you know for sure he got your text. Why not call him? He may not want to bother you while you are sick.

I can remember when I had cancer I had several friends I expected to call but they didn't. Turned out they were afraid of bothering in case I was feeling bad. Even my mother didn't 'bother' me on chemo days. Nothing would have made me happier than to hear her voice, but I didn't want bother her so i didn't call her either. Silly Huh.

And some people just are more thoughtful than others. That doesn't mean they don't care. They just don't show the way you do.

Anyway I hope you feel better soon.