Is it wrong not wanting to date till you lose a little weight?

I was always athletically built, I am 6'4 and 237 47 years old, I still workout at the gym. I had an injury to my ribs and gained 10 pounds, and my target weight is 210, I feel like I've been missing opportunities with women being I have a gut, but everything else is fit. This woman at work in her 20s asked me to have drinks with her after she quit her job on her last day, I don't even know how old she thinks I am, but I feel way more attractive at 10 pounds lighter and more confident at 20. I don't want to blow her off because she is really attractive and its very hard for a woman to ask you for anything as you get older, does anybody feel this way?