Cheating on my (23M) then girlfriend (22F) by eating out a coworker (F) in my car after a party [MF]

Hi, first time posting here. First time writing a story like this actually lol, please excuse any mistakes and errors.

About me: Brazilian guy, 1,76m tall (Google tells me that’s about 5”9, to all the American readers out there), white, really dark brown eyes. I change my appearance very often lol but at the time I had very short dark hair, wore glasses and had a clean shaven face. My body was pretty average-looking, overall I was lean and a little fit from working out but I didn’t have abs or anything.

So this happened a little over 2 years ago, I had been dating T for almost 2 years before that as well, we were both 20 and in college when this took place. I had just managed to get a really good paid internship I had applied for, so I was pretty happy. Aside from the owners who were older, my coworkers there were comprised mostly of the other interns, still in college like me, and our supervisors, who were almost all former interns that the company liked and hired as soon as they graduated, so everyone was pretty much around the same age, in the early to mid twenties range.