What have you ever done that you really felt guilty about?

Title says it, for me it was drowning a lizard to death in the shower place after it came in through the window, i just took the hose and opened it on max and pointed it at it for like a minute or so until it died :(

Jerkin in the shower lmao. Dont know why but I always feel guilty jerkin off whenever.

Losing my virginity in my dads room. It was really weird and i still regret it.

Hmm. This was happen long ago.
I bully the girl i like and turns out he hated me because of that.
I did try to apologize and say sorry back then but she doesn't hear me out. x)

Once i saw her again, i will apologize.

When I was nine, My sister had a pet cat named Doodle. She called it Doodle because of its color and her love for Cheese Doodles. However, she decided to hide my PS2 controllers from me and wouldn't tell me where she put them. So I threatened to throw her cat out of the window at the top floor of the apartment complex. She still decided to keep hiding the controllers from me. Therefore resulting in myself picking up her cat and holding it over the edge. She begin to yell at me, and I told her to go get my controllers. Before she could even go to get the controllers the cat began to go crazy and attacked me. My hand released due to the sudden shock. Sending the cat down twenty feet to its crushing death.

She still brings it up to this day, and I am 19.

When I was 9 I stole a kids Pokemon cards and I still feel guilty about it to this day... I don't even remember the kid now but I still have the cards

In kindergarten this girl that i still know to this day, i stole her toys almost everyday. She would cry to the teacher and i would just chill in the back and smuggle that shit home.

When I was 9 I always stole stuff from the store and my friends. it was funny at the time

Roasting.

At my high school, if you can roast, you're a god. At first, I could hardly insult someone.
Then, I started trying to come up with roasts in my freetime, until eventually I was practicing roast battles with friends, and then started doing the real thing. It was a roast battle with some random kids at my school, but eventually it got out of hand.

Step on my foot?
I roast you.

Cut me in a line?
Roasted.

Until one day, I roasted this girl.I roasted her on her hair, clothes, etc.

The next day, she came back with different hair and a whole new style of clothes. I felt so bad that I completely changed someone by insulting them.

Getting away with minor things that not many would notice