well, I can't judge. I hope everyone works out with you.
Secondly, I can understand how you don't want to get old, since I believe that your self image has also revolved around your body image like everyones here, but some individuals don't want to give up anything when they get older, they don't want to accept the fact that human body is designed to collapse some day and it seems unfair when you think you have to be strong and look good allways.
But for a 50 year old you look really good and you're not collapsing. I don't think you need therapy, you just need to realise that, well, you are 50 but you've been younger before, this is another stage in life... and ofcourse a young hoe embracing you might help
