At 20 years of age, I am afraid of this too, really. I can't seem to exist without some sort of love interest or partner or "friend that happens to be a girl wink wink nudge nudge" to interact with (I am a hetero male, btw). It's just one of those things that I wake up in the morning and tell myself that it's something that I need to do. I've never talked about this urge with anyone, ever, it's something that's been a part of my personality ever since I was in adolescence. I've always been that guy that just gets infatuated with his love interests and crushes, and I accredit that to the fact that my mother passed away when I was a child. I've read on the internet that your feelings towards romantic partners and relationships are based off of your relationship with your parent of opposite sex, so this urge makes sense in that my relationship with my mother was based off of distant admiration and endless longing. Anyways, The only girlfriend I've had was, embarrassingly enough, through an online relationship. A former WP member, as a matter of fact. We broke up about a month ago because of long-time problems that I hoped would fix themselves but of course they didn't (perhaps my optimism is an expression of my desperation and will lead me to fatal ignorance once again). I barely interact with the opposite sex in real life (mostly because I have no "outside-world" obligations besides attending a small technical college, which hardly has the kind of population or culture for socialization with other students to be very worthwhile), no girl has ever asked me out, and I have yet to even have a romantic kiss with a girl. Sometimes the only reason that I socialize is in the hopes that it might lead me to being in the position to find a girl I might like. I kind of wish I could rid myself of this urge, but at the same time I find having close relationships with people can be very enjoyable, it's just that I have a hard time finding a reason to interact with people outside of a social structure (and, in my book, a relationship is a social structure). Perhaps I just need to be more proactive about interacting with my friends, or maybe these two things are completely unrelated. Idk, but it almost feels wrong to do what I do (which really isn't as bad as I am making it out to be, fyi) for the sake of finding a GF. It seems unhealthy and irrational to be so fixated on this.
Ahem, sorry if this wall of text is bothersome or makes it look like I'm trying to hijack the thread but after a super awkward interaction with one of those "friends that happen to be girls", I've been thinking a lot about my life and how I feel about relationships. I'm conflicted because I really do want a relationship but I'm not sure if it makes sense for me to go out of my way to find one.
Btw, I'm trying to be as honest and non-objectifying/creepy/weirdly flirty as possible when I say that you are f*****g stunning goofygoober.
I would ask you to "befriend" me but honestly it seems that you've already got more than enough people asking you that. 
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Nosce te ipsum - Know thyself