Does making six-figures and getting a Ph.D qualify you as a worthwhile person? Because there are plenty of people who think six figures is a pittance... and I know plenty of Ph.Ds who are dullards in every sense of the word.
Kou, this is a good question for you....Intlset is right....when will you think you are aworthwhile person? Six figures, a PhD isn't going to do that....you already are great, just being you!
I know it is hard for you right now to see that, and I can see you are a type A, like me (very similar high school records, looks like...but I loved high school)....but as someone who has been through a lot of ups and downs and turns in life, I think the best advice I could give you is...remember happiness is true success. Money, prestige, etc are great....but don't always equal happiness.
I just went to my 20 year reunion, and wasn't even worried I was not even close to being 'where everyone thought I would be' I always thought I would make tons of money, and go back for my PhD, too...Instead I met my DH....and took a different path. DH is not at all like anyone, I thought I would be with either....
Why didn't I care? Because I know I am very blessed, with a happy, healthy family, well behaved kids, and good friends....I am proud of myself for the things I have done and do (lots of volunteer and charity work, good friend and caring person) everything else was secondary.
Hope this helps...remember what you do, and what you earn, are not who you are.