First of all, I'd like to say hi to everyone reading this, hopefully by getting this off my chest I'll feel a little better.
I started uni about a month and a half ago, and I was having fun. In my second Pre-Professional Psychology lecture (I'm doing a BPsyc), so the second week into uni, I noticed a girl who was smiling at me a lot, so I was smiling back. I thought nothing of it until later in that week, when I saw the girl again. I had a feeling, really strong, and so far it hasn't gone away. She's in all my lectures, including my elective, and every time I see her, in either the lectures or just around campus, I turn into this wreck inside. My heart just doesn't slow down, my brain gets all muddled, my stomach flips. I'm not a weirdo, like a stalker or anything, I've got a solid group of really great friends, and I've never been a depressive or loner. I'm not overweight, I like to be healthy, I play tennis regularly and I dress nicely. And I've never had this feeling before. She's never not on my mind. I don't want her for her body, however she is very attractive and pretty, and I only know two things about her; her first name which I heard a friend of hers call out, and that she does ballet, which I overheard in a lecture. I'm not stalking her, I'm not constantly listening in on her conversations, it's a bit hard to miss this stuff when she, and her group, is sitting in the row behind you. I've had crushes before, and I'm sure some people have had crushes on me. But I'm not really an intimate person. I have both female and male friends, so I'm comfortable around all genders, and my friends would class me as an extrovert, I'm never hesitant about going up and saying hi to someone at a party, or playing the fool, or talking to someone I've recently met. But this girl is different. Every time I think I'm going to talk to her, I can't. She's affected me in drastic ways, I don't eat normally, I am more depressive lately and I'm less talkative, which is a big thing for me because I usually never shut up. My friends have seen her and said she's pretty enough, and say that I should definitely go talk to her, that she looks at me when I don't see it. I've never been in a romantic relationship before, however, and due to the lack of intimacy in my life, just going up and approaching her is hard enough. She is one of the only people I've encountered where I want to talk to her to get to know her as more than a friend, but I'm afraid that if I do talk to her she'll just reject me, think I've been stalking her, etc.. All I know is that I want to get to know her, but I don't even have the guts to approach her and introduce myself, of which I've had a ton of opportunities over the last three weeks. Hopefully this forum will allow me to express myself and get this all off my chest, so I thank you to those that have read this, I know this is all a bit silly, reacting like this to a girl I've never even said a word to, but even the eye contact and smiles is enough to make me feel sick to my stomach.

Thanks guys, hopefully I'll be able to get the guts to at least introduce myself to her. Just wanted to put my predicament in writing.