I don't think I've noticed it in other relationships but haven't really put a lot of thought into it. I am VERY guarded with my T. I read the blog Tales of a Boundary Ninja which is VERY helpful to put words to what I'm going through in therapy since I wasn't tought how to express my emotions. And, her entry on attachment was dead on me - why in the world does this one person matter so much to me. And, wanting desperately to be close to T. yet put up a wall the next session.
I told her a ton of things last session and wrote in my journal the next 2 days how great it was and that I can now tell her anything. I went on a trip and wrote later in the week that I hate that I have any feelings towards her and that I told her so much. This is me weekly - open up, regret, open up, regret.