You are envious of something your friend got from this T that you really wish you had also. This is fair enough to feel and acknowledge, just don't let this get between you and the friend, or you and the T. Acknowledge it and look at why you want this feeling of closeness and support, and how you may achieve it in other ways.
You are also possibly jealous of the relationship between your friend and your T. Maybe you worry that this will weaken your relationship with the T? Don't let this worry weaken your relationship. Be as honest with your T as you can about what you feel you need. This will make it easier for the T to help you.