Swim party broke me out of my shell [FMMM] super-long

First a little about me. I’m a 19 year old college student at USC. I’m 5’2” tall and a robust 105 pounds. I have some experience with men but it’s all pretty vanilla and nowhere near amazing. I love oral but tend to be overly cautious with sex. I am super socially awkward and that doesn’t tend to help my cause very often.

Then there is my twin brother. We couldn’t be more opposites. He is 6’1” and probably 180 pounds. He is always super outgoing to the point it annoys me. He is always trying to get me to go out and I tend to resist. His friend from school was having a party at his house so I was invited. I didn’t want to go but decided I would at least show my face for a little while.

Two minutes after we arrive my brother disappears to talk to a girl he’s been chasing for months. I didn’t see him again until close to three am. It was a pool party so I just found a chair and laid down in the sun.