Is it normal that i now regret not doing this?

So, about 5 years ago,a friend invited me to an end of the year party. i went, and it was fun, but it got crazy towards the end.

We started playing spin the bottle & one of my friends (friend A) spins it and it lands on me. Of course, i hesitated because at the time, i wasnt a lesbian or even bi and had never really been exposed to that. the game went on, and soon ended. so then we played 7 minutes in heaven. The person running the game told me and friend A to go make out beside the house. so we went back there to keep up appearances. We STILL didnt make out and i regret it now.

since i'm bi now, and attracted to the person, i regret not taking the chance. everyday i regret it. its so painful. every day, i wonder how my life would be different if i'd just taken a chance. It just depresses me since im the kind of person that will absolutely try ANYTHING. (i'd jump off the empire state building if i had bungee cords attached)
Is it normal to almost hate myself over it? I just know if i did make out with her, i'd have probably discovered myself alot sooner and saved alot of the wasted time i spent chasing after all those boys. also, is it normal that it just started bothering me recently?