Ladygaf, you assistance is required, pretty please (with sugar on top)

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OK, so I've been clubbing (dancing, whatever you guys call it in the states) once (only 18). Went with a couple of mates - it was great fun. That was a couple of months ago now, and I would like to do it again now. The predicament, none of my friends wanna go again. So what do i do? should I go by myself? Would I been stigmatized as a loner? I mean, you see all these groups of friends going on a night out. would It come off as a bit desperate walking into a club by myself, without any friends? when you guys go clubbing, do you go with friends (i guess as a social backup), or by yourself?
I guess that's the first question, the second is:
I am currently studying a very geeky degree (IT and Corporate Systems Management). So, naturally, their is a limited (basically none) supply of girls. so basically when ever I go to uni, I am surround by guys, talking about nerdy stuff (I'm sure that's a turn off for girls). Where do you guys recommend meeting girls at university? whenever I go to uni, everyone seems to be in their own world and its really hard to find someone new to talk to. Its not like i can approach a random hot girl and start making convo.
thought of another question, soz guys.
So basically I've been a real insecure person the majority of my teens. why? well lets just say i had really bad acne, or at least I thought I did (have been on acne drugs for like 5 years, on my second course of roacunate (Australian branded I think)). I'm talking real insecure. Like if i saw a hot girl, i wouldn't be able to look at her again. not even look. Basically I tended to void girls as much as possible. the funny thing is, through my high school life, I have always had girls approaching me. Ive been asked on several occasions (by some of the hottest girls in the grade!) to go out. in these situations i basically freak out, I sternly say "No", and kind of defuse the situation asap. I was asked out to the formal (prom) by a girl. Physically, my acne is much better (thank god), but mentally I'm still in my previous mindset (avoid girls!). However, I want to get to know girls, i really do, but theirs like a barrier, fucking barrier, its like Hitting the wall (running). So how do i overcome this overriding mental position I have, and which I have always had.
PS: love how neogaf is like a community, genuinely try to help each other out.
PSS: love from australia!