[Maria]

Cindylou,
I'm going to say something that might sound rude tho I don't mean for it to.

You're mentioning your feelings re getting panicky and worried and wanting to just visit, possibly say goodbye.

Right now I realize you don't know what your friend feels because you've not gotten a response re your email but I would have to think that the family is working with their father's best interest at heart and so probably he is very limited in tolerance for whom he can see when, if he can even tolerate visitors or be alert (or presentable in his mind) for them.

If it means you say goodbye in prayer or thought or a card/letter or some such gesture then perhaps it's what's meant to be in terms of your friend's health.

I think you have to be patient on this one and myself personally I wouldn't say anything further other than hoping to just have a very brief visit with your friend if at all possible.

As others have mentioned there is no certain etiquette re this situation. I hope perhaps you will soon hear from the daughter or a family member soon with regard to your email.