Tree. You don't need to be scared. This is T. No matter how you interpret any given email on any given day (and from any given state of mind) this is exactly the same T you have known for the last three years and he has exactly the same commitment to you as he has always done.
If he 'sounds' or 'seems' different to you right now it is not because he has changed, or his feelings have changed - it is because you are triggered. You have been in this place many times before, and many times before you have come out of this triggered place and worked your way back with T. This will happen this time too.

T has not changed any more than usual. He has not suddenly become untrustworthy. You are triggered. Go to T and let him help you find your way back.