You can't go back only forward, find peace with your past. A therapist can help. Put another pearl on the string of life and move forward.
My biggest regret is not going to therapy sooner. I would've been so much happier sooner. Now I laugh at the irony of that statement.
As a European, I studied in the UK and got a masters, tutions fees paid by the European Union. My children cannot do this anymore.
My young is 17 and spend his free time in the gym, and he is not alone. It is true I could not do this at his age, but I do not understand it.
I'm also perusing of doing a pilgrimage, not because I'm religious, but because it has a lot of facilities along the way. The real thing stopping me is to take the time off to do it.
For example, if you dated more and had more good relationships can do some good for your self esteem, but you'll still miss these things now if you don't have them.
And the end of the day only the current moment really matters.