I generally don't think of my T's other clients in relation to me. I know my T wants to expand her practice, so I am happy to know she has clients. Also, I must admit I tell myself that I am my T's favorite client, so all those other folks matter not at all!

My advice is only to try to think of what your T gives you in the moment you are together. You have her attention and her care at the moment. She can be there for you, even with many other clients.