If he can't meet your needs, then he is not enough. I am in the UK too and I know from my searches that what (I think) you are looking for is difficult to find. Difficult, but not impossible. That type of deep relational work is life changing, But most therapists aren't willing to go there. Like you, I had no friends, no passions, no interests, no sense of self, no feelings, no one I could trust or turn to. I found someone willing to be that pillar for me, who allowed me to be that small child again and to learn to grow and develop in the right way. To learn how to make friends, to find my place in this world. To become me. Like someone else said, it can be life changing. It has been life changing, but it needs the right person. You are not too much, but your therapist isn't enough. There is a huge difference.

I'm really sorry you are feeling like there is no hope, no way forwards. I don't know what else to say except I can really hear your pain and I hate to see you in that place, as I have been there myself.