No Regrets?

I don't know why I'm feeling so philosophical lately....

So, in theory, we're supposed to live life without regrets. Is this possible?

For me personally, I definitely have a couple things I would have done differently - as we all do. However, I do have a couple regrets. Not things I said or did, or didn't say or didn't do - but rather, how I reacted to certain situations. I regret letting some things bother me as much as I did. I regret carrying anger over certain situations for so long. I regret letting certain experiences get the better of me. Letting the terrorists win, if you will.

Is it possible to live without regrets? Everyone seems to say we should, as a sentiment, but is it even possible? I think regrets are a sign that someone cared. Is it possible to not have regrets and have still cared?

I honestly dunno where these posts are coming from....but your thoughts are appreciated.