I had this problem with other therapists and never got over it. With the one I'm seeing now, I feel totally different, so it might have been about having found a better "fit." One thing I do differently is take in a small notebook with a couple things I want to bring up--just a phrase or word for each thing. And I keep the notebook open to that page to remind me that I don't want to leave without bringing at least one of them up. She has never made me feel awkward about anything I share, and I have shared things I would never bring up before.

So, it could be that I got over freezing up because I found the right therapist for me, or it could be that I finally reached a point of desperation and am just willing to plow through the internal barriers and say it.