It sucks. One of the things that helps me is journaling. I had a T once who had to set the same sort of boundaries with me. I would write down the things that I would tell her if I could, or when I could, talk with her. Also, and this sounds childish I know, I would color. I got a big big coloring book and box of crayons and I could color for hours on end. I don't know why this helped me, but it did. Also, be careful about what you read, listen to, or watch on TV. Sometimes these things can trigger those needy feelings. You will probably have to try several different things before you find one that works for you. This is most definately something you should be discussing with your therapist. Good luck to you.