Regret

Regret. Everyone has regret, some small and some big. I have regrets. I regret hanging up on my mom when she told me Emily and Abigail were going to sleep at their grandparents instead of our house :) To this day i regret not accepting my mom's offer of buying me a Cat in the Hat stuffed animal at Universal Studios when i was 5 years old. That regret gave me nightmares until my Christmas when i was 7. My parents got me that stuffed animal that day :P (and yes i seriously had nightmares over a stuffed animal).  I think i thought i hurt my mom's feelings when i rejected her offer...even though I've found out in the last year that she couldn't have cared less :) Anyway, there are those small regrets, but then there are bigger ones. In my case right at the moment is the one of getting into a relationship that ended up really being really stupid. My question for whoevers reading this is if i have things that remind of that regret....should i keep them? should i keep letters/emails because whenever i read them i learn from them and know what not to do in the future? or should i throw them out because when i read them i feel like such an idiot and i beat myself up for giving away parts of myself i wish i hadn't? I'd really love any thoughts anybody has.  Cause I'm cleaning out my "memory, personal, junk, various" box (yup I'm one of those people that has that :P) and I'm having some issues with it. sooooo i'd love to know if i should keep it and remind myself of what i shouldn't do? or trash it.