I'm happy that Davids brother wants me to be apart of the celebration tomorrow but I'm starting to…

I'm happy that Davids brother wants me to be apart of the celebration tomorrow but I'm starting to get second doubts about going. I feel so self conscious about my body and I have never had this problem before)": I don't know what to do. I dont want to go and be "Debby downer" but I also don't want to stay home and them think I'm being disrespectful because I didn't go. Damn