Just be patient with yourself...I've never cried in front of mine in the 2 and a half years I've seen him, but it was only recently that I've been able to actually feel emotions in session instead of just talking about the ones that I process in between sessions. And some days I still don't feel much during. It's all about the anxiety for me. I don't cry in front of anyone, much less someone I'm not comfortable with. The more comfortable I've gotten with my therapist, the less detached I've become.

But you don't have to cry to convey a strong emotion...Their empathy is usually enough to pick up on it.