Life's Questions

If I were offered to relive the last 10 years, I wonder if I'd accept. When I was younger there seemed to be a future and the posibilities were infinite. Also, time wasn't a worry and it did not betray my dreams. Although I still have dreams, my dreams seem harder to achieve now that 10 years have past and as I've become bogged down with work related responsibilities and commitments. There is so much I want to do, but as I get older it seems that my time is getting shorter. What purpose was I born and why was I given what feels like such a short moment of time. I don't want to be one of those who die with regret and is sorry for the things I've done/left undone.
I know I'm only 28 and I'm sure I've still got many more years ahead of me, but that's something you never truly know. I could easily die tomorrow and if that were the case would I truly look back and say I was proud of all my accomplishments. Am I working a job that fulfils me? Am I really living life to it's fullest? Am I doing enough to make this world a better place? Have I truly experienced LOVE? Have I really seen/said it all?
-If I'm still around in 10 years maybe I'll have answered those questions or will I look back at 28 and think of the many opportuniteis around that I wasn't aware of?