A girl in my class

I'm a 17 year old boy in a pretty average school. There are a lot of girls but the most aren't single anymore but, his year, one specific girl caught my eye, it was love at first sight.

But, i don't know how to get closer to her, I never had any girlfriend, only friends, too many…

I'm not the beautifulest person on earth but i'm not that ugly, i mean, i take care of myself, i dress up correctly. I'm pretty funny and always smiling.

I think the problem is that i'm not interesting, i don't have any clothing style, I dress up with basic jeans and shirts. I'm pretty good in science and math but I still don't know what I like and what I want to do later on. I don't have any passion, I only like video game and guitar but, as my name say it, i'm bad at it.

Could someone help me ? Give some tips ?

Thanks for reading