How do you guys get laid?

I am (F19) a computer science major, and like most of you guys, I work a ton. I work overtime, study in my free time (just for my own projects), and I am also taking a German class to try to get out of my comfort zone and up my social game. I will be interning this summer though. I also take really good care of my body and my health...I go to the gym every other day, and I also take yoga classes to relax and prevent injury. I genuinely love my studying and exercising and I get so much joy out of it, but I am also pretty lonely. I can't seem to find any men who I'm into, or who are into me. My friends are all like, "just put yourself out there! apply for a job, meet new people!" and I am, but it's no use! I'm just so confused. I'm a very confident and outgoing person. I have reasonably high self esteem (I am willing to admit I need to work on it), and I am just not sure what to do. I also am not the "hook up" kind of girl...I would much rather get to know someone beforehand. I'm just so lost.