I had [M]y [F]irst college hook up without realizing it

So, background on me. I was a loner/quiet kid on high school, who really didn’t party or hook up with girls a lot. I wasn’t a virgin my freshmen year of college, but I also was not experienced at all with girls.

It is the 3rd weekend of my freshmen year of college, back in ’02. My friends and I get an invite to a party at an off-campus apartment complex, which has a reputation for being a real party hub. We go to the party, start drinking, and I catch eyes with this gorgeous upper-classman. She was short, petite, wearing skin-tight black pants and a tank top. I walked outside to get some air, she followed me out, “bumped” into me, and we started making small talk. I mention I am studying Meteorology (atmospheric sciences and weather), and she starts asking me about the stars (thinking I am studying meteors, I guess). I start to bullshit her a bit, she tells me about herself, and we end up back inside the apartment on a couch together. She is rubbing into me, I ask if she is ok, she says “I will be”