If only friends, then occasionally tell her that something she is wearing looks good. Add more each time, but do not overdue it. Don't lose a friend because you have a hard on for her.
i dont get it.
i wouldnt ever ditch a girl as friend even if she told me i was attractive or that she liked me, etc. I would feel complimented. Even if I didnt like her back in return i wouldnt abandon her? i mean why would anyone do that? i wouldnt even let things be awkward, they dont need to be!
natural WITHIN the context of the situation;
now whether you're the one who dictates the situation or not also depends on whether you're capable of being in control and take matters in your hands, or let it fly
and damn you're tiring - go out try things instead of asking a million questions