You had a lovely smile. I would imagine that could still be there. Or you could get it back. It is in your eyes as well as on your lips. I think if I had met you then I would probably have been intimidated by a confident seeming Essex wide boy!
You are certainly not the only person to lament your lost youth. I think it is an almost universal experience. As either George Bernard Shaw or Oscar Wilde said (depending on the source you look at) 'Youth is wasted on the young'. You only appreciate what you had when it is gone. That is what keeps the cosmetic industry going.
And it goes on. I am a decade older than you, and I wish I was back in my 30s now! Probably in my mid 50s, I will wish I was back in my mid 40s.
I know it sounds corny, and is oft repeated, but the thing to do is live in the present and make a better future, not worry about what has gone and can't be changed.
By the way, I have noticed that you are often good at helping other people with their problems, suggesting solutions and so on. You are an intelligent and compassionate person. That is more important than looks. Looks may attract people to you, but it doesn't keep them.