I've learned from everything I've done and only regretted the things I didn't have the courage to do.
Not do it and regret it. At least if you do it, you'll know what you regret! All my regrets are should haves, or should have betters. Ugh!
not to do it. at least then you know for sure it was the wrong thing. the worst is to be forever wondering...
not do it and regret... that one can really suck.
not to do and regrat
Both are equally awful. I lost a whole set of friends over an affair, and the sex was mediocre at best. I passed up on another affair, and ended up in a dead-end relationship. You just have to take a chance and see where things go.