K speaks the truth don't bother trying to figure out if she likes you assume it.
If she does reject your advances (but she won't, just a vague outside chance) then be cool about it and carry on as if nothing happened then it won't be weird between you and also if you stay friends she might have some hot mates too
You seem to have a good friendly relationship with her but as K and Legend have pointed out you need to show her you are interested by telling her she is sexy / hot / cute (as K said) and touch her, don't look at your hand/arm when you do it, do it like it's a natural thing for you to do.