I was 17 and never went to a show/concert with friends. My dad never let me, saying that it's dangerous because of drugs and bad people who can hurt others for multiple reasons.
It was not very common of me to go out in general, he wouldn't let me.
So I talked to my best friend for us to go to a show when we finished highschool. She agreed so I talked to 4/5 other people from my class to come too.
I asked permission to go and my dad said yes but that it had to be me paying for that. I was confused because he usually wouldn't give me any money, so I had to use all my savings for this. This was 4 months before the show.
When there were 2 days left to the show, my best friend said that something came up, so she couldn't come. I was so sad, but decided to go anyway with the other classmates, and didn't tell him because I knew he wouldn't let me go without my best friend.
The day before the concert, he ran into my best friend and asked her if she was excited and she replied that she wasn't going after all.
He got upset and called me to say that I had to choose: I wouldn't go and be grounded for hiding things from him, or I would go and be doubly grounded for not being humble and still going after I knew I did wrong.
I chose to go and got grounded for 17 days where nobody in the house talked to me, I had no access to technologies in general, and was confined to my room all day.
Until this day, he thinks he did the right thing, but I never got over it.
AITA for choosing to go anyway?