I used to find it hard knowing I wasn't T's only patient/client - especially when my T referred to 'booking me in a slot' or anything that meant I was part of her job and not anything more.
I did mention how I felt about this once or twice and the fact that she acknowledged this did seem to help.
These days I don't think about it at all - I AM part of her job but I also know she cares about and is concerned about all of her clients. The actual relationship I have with her (as opposed to the one I used to wish we had) is the one that I need and find most helpful. I didn't used to think I would EVER get to that point, but I have and it feels so much healthier and happier. But, back then, when I used to feel so hurt and 'jealous' I wish I'd heard someone say what Rainbow8 has said above:
'You know a mom who has many children loves each one!' I think that's a lovely way of looking at it.