honestly, I don't see how calling T is going to help your situation, but it sounds like you aren't going to get much help from your facilitator unless you call T which I think is kind of dumb of your facilitator really, since his job is to help this not happen if you do end up calling T, try to get everything written down. actually, for that matter, if you feel the same way I do about calling people (phones are terrible and confusing), I would suggest emailing T if you can for ultimate transparency, cc your facilitator basically, T appears to be working on high school social interaction rules: the person in charge is the bad guy and if we tell him anything that makes us bad too, instead of actual adult rules where the person in charge ought to be helping and facilitating, or offering ways to accomplish that oh, also, if you haven't yet, maybe keep an email file of all your interactions with T and/or facilitator. if there is more conflict, having a solid paper trail is one of the best things in the world.
if you're worried about T being able to see, there is an option for a bcc, which I think stands for blind carbon copy. at any rate, it means the facilitator will see your email but T won't see that the facilitator can see your email. honestly, I would definitely say to email your counselor. and also, for that matter, include everything you've just said about being this worried about what T will do, and being this worried about the response of your facilitator. being a responsible adult does not mean that you do everything all by yourself all the time and are never worried, and I'm a little worried about the people who do think that. it means you have the ability to ask for help, and the ability to accept help, and the ability to offer help.