Hah, at 20 I was an automotive engineering undergrad, something of an introverted and bookish geekette with a passion for motor racing. I was one of three girls on my degree course, and despite the overabundance of testosterone at a predominantly engineering-based Uni (Brunel), other than the occasional foray (still good friends with a couple of my "dates" more than two decades later), I preferred my own company and still do.
After some rather disastrous subsequent relationships, my heart and I don't really talk that much anymore. I'm now of a mind that if love happens, it happens, and if it doesn't, I'm happy with the status quo.
You do need to spend time on your studies. Working on your own is a big part of doing a degree (I've gone through a BEng, MEng and PhD in my time) but you do need an escape valve as well. Cycling is yours, motor racing was, and still is mine.

As long as you can achieve the right balance, you'll be fine.