I know you said writing hasn't worked already, but what if you just keep writing to your T but just chose not to send the ones that were maybe too long and involved, and instead brought those with you to read in therapy? This worked for me finally... I just kept writing "to my T" but stopped sending all of them, I'd save the drafts... I'm the same way that it is way easier for me to disclose things in email then in person. At first it was really difficult for me to even read the un-sent emails I brought in, but it got easier with time and experience. (I do think that forcing yourself to say difficult things in therapy can really have a positive effect if your T is any good at all.) If you get in there and really cant say it you can always hand your T the email for her to read in person, I did this once. Now I'm able to go in with what I call "cliff notes." I've hit the point where reading the whole email seems like a waste of therapy time so I jot down the highlights in bullet points and then with my "cliff notes" there to guide me and keep me remembering what I wanted to say I try to talk about it.