((((( HUGS )))))
I could have written your post. I feel the exact same way. My T's wife is a beautiful, petite woman. All the women in my group therapy are also thin and very pretty....and I am obese and unattractive.
Although I haven't addressed my physical appearance in group T, I have been reassured by several members (women and men) that I am very much valued and cared for. Yet, it's still hard to trust that - because I can't imagine how they could feel warmly towards me with the way I look. And I'm absolutely convinced that the feelings towards the more attractive ones are more favorable....I mean, who wouldn't want eye-candy walking into the room. BONUS!
My T has told me that I fall in the normal range of looks, so if I am seeing myself differently, then it needs to be explored. Umm, normal? BULL. Especially, when I'm surrounded by people in therapy who are much more attractive and within normal weight ranges.
Sorry to ramble on. Just wanted to let you know that you are not alone in these feelings....and when these feelings surface, I, too, want to hide and never show myself in therapy again.
(( HUGS ))