I still struggle with this. I agree with the others -- other ways of communicating may work better.

For me, sitting there with her makes talking nearly impossible. (And it's been years!) For me, phone sessions are a lot more productive. They seem safer, somehow. Email is good, too. I can email as much as I want, and she only responds if I specifically ask her to.

Maybe write something down and hand it to her? (For a long time, even leaving phone messages, I had to write down what I was going to say beforehand, and then read it out loud.)

Don't worry too much about this problem though, because it's not unusual. It's just something (one more thing!) to work through.

Good luck,
-Far