I hope you're able to tell him all your feelings when you see him. He may not have a regular slot open, but he may be able to see you a few times on an irregular schedule, and he might be able to waitlist you for a regular time.

He also might have terminated with a lot of his clientele when this event happened over the summer (whatever it was) and it might show how much he values you, that he's made time even when he's drastically reducing hours. I hope he's forthright about what's going on, when you see him.

Whatever it was, it sounds major and not related to you, but I understand it can still feel like abandonment even when the rational part of one's brain knows that isn't the case. Try to hold tight till you see him, and remember the caring he showed for you the last time you saw him in person.