I empathize with you. The person I was before the illness was a driven, overachieving, take life by the tail, confident person with a full, busy life and social life. I miss her and there are times I mourn her because I'm just not the same person post illness. I'm sorry you are feeling that way. You're not alone.
Your post has inspired me though to see if I can set some goals for the "new" me so that a few years from now I can look back with fondness and pride. Thank you. Sending big hugs.