University.... Never been with anyone????

You're 27 dude. Get out to some bars with friends and start making up for lost time. Life isn't over because you missed out on the college life. I'm 31 with a good job, and I still get out with my friends and experience life. I was pretty introverted in my youth as well, but I was had managed to get engaged in my early 20s. Just get out there and find a few ladies and knock a few.