I absolutely hear you and understand.
I'm under EIP and when I was told that my case worker was leaving, I absolutely bawled my eyes out. Right there, in the clinic.
I had 40 hours with a psychotherapist as part of my care. Yep, bawled my eyes out again at our last session. I honestly couldn't see that I would manage without her.
You get three years of support under EIP (early intervention in psychosis) and my three years are up next month. I'm ready to be throwing myself on the floor, having a tantrum, howling and screaming 'it's not FAIR!!!' like a very old, should know better toddler.
But...! You've learned, have new skills that you didn't have before. So, do your therapist proud, take those skills they gave you and put them to practice. It won't be the whole answer, but try them out, give it a good go, and if you need more support then you can seek it out at that point.
I've had various therapists since I was 14 and I'm 52 now. Some I've really connected with. Others, not so. You've made a connection so that means their support will have been successful. Keep focusing on that. And take that forward.