Well, if I had to give advice to someone that really shouldn't be looking for love in the first place, I guess i'll throw in some cents.
Try to get her to be friends with you, and I do not mean forcefully. This is probably one of the biggest steps to building up a relationship, since she would know you, and would eventually gain feelings for you possibly if you're her friend for long enough. At that point, let jesus take the wheel, and let time fly by, while still her friend. It may take a while, but eventually, she'll ask you to do some things with her, like go watch a movie or spend some time in a nice place or maybe grab something to eat. Before you know it, and with enough luck of course, she'll ask you to go to her house to hang out. This is where I enter the second reason of what to do.
Just act normal. and don't do anything weird. This is to show that you are her close friend, and that your mind is pure, ridden of all the weird things couples would usually do in someone's bed. If you start doing or saying weird things, she'll most likely just stay a friend of yours, and not really attempt a relationship. Don't really introduce any of your deep secrets until you two are really together, and by really, I mean around when she feels the need to 'do it'. Even then it's a risky move, but that's up to you. I cannot predict how the outcome would look like, but the conversation would be quite interesting. As long as you do that, you'll most likely be in a relationship with a bit of time.
As for telling her you like her, I wouldn't jump on that bandwagon yet. If you must tell the fact that you like her, then take Twerky's advice and just do it. It will make you feel nervous sure, but time may not always be the answer. Alternatively, you could try doing signs while she is looking at you, such as a heart sign to signify that you care for her. Try not to feel nervous when you get near her, or she may get the feeling that you are hiding something from her that is sure to make her suspicious of you and your truth. You could also try telling one of your close friends, but that's risky in it's own way, since even close friends can backstab you at times, and not literally. That's why I suggest either telling her indirectly that you like her, or just go up to her and tell her you like her. And try not to include 'as a friend', that may make the conversation seem awkward.
That's my advice on this situation, through I could try and come up with more.