I'm fat. Should I be naked?

As I creep towards another birthday, I have accepted the fact that I no longer have an attractive body. I felt desirable all up to my 30s, but after illness and injury, and a subsequent sedentary lifestyle, I only feel repulsive. I try very hard to feel good about my body, but the images of beautiful bodies assault me everywhere I look. Injury has made it difficult for me to exercise like I used to, but I still try. I'm happy with who I am, my personality, my character, my disposition, the way I carry myself, etc. I'm your typical good-natured nice guy. (And modest AF!) I just don't like how my body looks. Can anyone offer any advice?