I can relate on wanting to talk about something in therapy but being afraid to. With my first (and best) therapist, I had written a letter one time and let her read it. It was a great way for me to put all of my feelings out there and I have trouble verbalizing my feelings on the spot. Maybe you can try something like that?

However, I think this is something that has to go at your own pace. You don't have to talk about everything at once. Go bit by bit. I wish you the best of luck with whatever you decide to do.