She's an awesome therapist, but I worry she will bail out on me.
Who is more important to her, you, or herself (her health)?
It isn't about bailing on you, and to be honest, that is a little selfish based on the circumstances you have stated here. She has health issues, has closed her practice, and you're only really worried about
you in all of this. You ask her how she is, but that is pre-tense to you confirming whether she is going to continue being there for you, regardless of her health.
I honestly feel you need to take a closer look at your actions here, and shift away from the, me, me, me, to the her, her, her, and find yourself a new therapist and let her get on with her life of taking care of her own health, if that is what she has already chosen by closing her practice.
I'm not having a go at you here, but I am stating the obvious which I wonder whether you're considering in all of this opposed to selfish needs and wants. We all have those, but they have a time and place, and I'm not sure this is one of them.