I'm not going to attend family therapy
Why won't you go to therapy?
I don't want to re-hash what all the other family members have already said.
That's good your family was aware of a problem and decided to get into therapy. It is essential that you provide your feedback -- each member's account provides an important piece to the puzzle. If you don't go, an essential piece will be missing.
I get it. I promise to go.
Therapy can be very good for you if you give it a chance. There is nothing to be ashamed about.