Hi reddit. This is my first time posting on this website, so sorry if there are any mistakes.

I (19F) am best friends with Lisa (18F). Lisa and I have been friends since we were little girls. I love her so much, and she’s basically my sister. I’m also overprotective of her since she’s a little naïve.

The trouble started when Lisa met Brett (20M) two months ago. Right away, I didn’t like him. He was a typical frat boy who is very condescending and sarcastic. But he’s also extremely good-looking—he’s always bragging about the fact that he’s a male model. It didn’t take long for Lisa to go crazy for him.

But I hate him. He’s so rude to me, and he says gross things about other women when Lisa isn’t there. I’ve tried to warn Lisa, but she’s so obsessed with him she doesn’t care… ugh. I’m getting annoyed just typing this.

Last week, Lisa and I were shopping at the mall when we literally saw Brett on a date with another girl. Lisa immediately started crying. I was so angry that I started yelling at him. Admittedly, I made a bit of a scene, but I was just so angry at him. He left with his tail between his legs like a coward.

Lisa hasn’t stopped crying. She’s a wreck. I’m so worried about her because Lisa has a history of depression, and I don’t want her to hurt herself.

After listening to Lisa cry her eyes out yet again, I decided to take matters into my own hands. I was sick of Brett making my best friend so miserable. So, I did what any good friend would do.

I broke into his dorm room last night. Brett was alone, which was surprising since I thought he’d have another girl with him. Anyway, I snuck up behind him with a baseball bat and yelled, “This is for Lisa, you jerk!” And then I hit him over and over again until his face was a bloody pulp. It was really satisfying because his face was so messed up that he definitely won’t be getting modeling gigs anytime soon.

Anyway, today I went over to Lisa’s apartment. She had the TV on and was crying. I asked her what was wrong, and she told me that the police found Brett’s body early this morning. I told her about the favor I did for her. I was expecting her to be happy, but then she got even more upset and called me an asshole! And then she ran out the door saying something about, “I’m calling 911, you psycho!”

I legit have no clue why she’s so upset. Can’t she just understand that I was trying to stick up for her? Honestly, I’m kind of irritated that she hasn’t even said ‘thank you’ yet. I did her a massive favor, and quite honestly she should be more grateful for what a good friend I am. AITA?