Hello everyone,
I'll start off by saying, I feel pretty dumb asking advice about such a silly, insignificant matter, especially seeing how important issues are adressed around here but I'll do it anyway. If you have the patience and politeness to read the whole post and assist me I would greatly appreciate it.

So, I like this girl and we're kind of friends lately. We've actually been in the same class for almost 2 years now but until recently we had never, ever spoken to each other. She probably viewed me as another boring guy. Several weeks ago, however, I accidentally found myself with her and a few other girls defending and debating in favor of atheism and that was the first time I interacted with her. The same day I stayed after class with the same girls and discussed about other subjects such as music, love, movies and so on. There, I found out we had a lot in common and realised I realy enjoyed her company. As you can imagine, we began to know each other a bit better and that's how I started liking her even more and eventually wanting her. At this point you will probably ask me, what's the problem?

Well, the problem is ME. I really wanna flirt or do something with her. However, I tend to overthink things and feel like there are many obstacles I have to overcome. First of all, I am very shy, socially awkward and unconfident about my physical appearance. It would be very hard for me to express my feellings for her and even harder (assumming she likes me back) to do something about it. I also absolutely HATE to draw attention, it makes me feel very uncomfortable. I know I wasn't able to do it before. I liked a girl and she eventually went away and having done nothing about it I felt horrible. Another thing is, if she rejects me I worry we won't be able to stay friends and as I said I really like being around her. I had thought of other things that scare me but can't remember anything else at the moment.

Right now, she's gone for holidays and will be back in a week or so. Yesterday, I made a viber account and added her. I didn't expect to chat too much be we really did. We ended up chatting until 4am. We're able to talk about taboo subjects without any problem and I feel remotely confident texting to her. I haven't given her any reason to believe I'm into her. My heart tells me do something, my brain tells me to wait.

What are your thoughts? What should I do?