Hi man.
fuck the body language reading. It will only bring doubt and confusion in your head. Body language should only be used in a larger context. Does her actions give you the idea that there is interest or is she acting closed up? Dont pain your brain on the body language details, every person is unique, you will confuse yourself.
You can choose: you can either keep on standing there, holding eye contact (which is good) and try to figure out if she really is interested in you by just looking at her body language, trying to figure out if what she does is an IOI or not.
Or you can go with this gut feeling you have that there might be interest and take initiative yourself. How? by showing interest yourself. Pull her into a conversation. You can tell very rapidly if there is interest or not. Then go for what you want. If you feel that the conversation goes alright, you should say that you like talking to her and perhaps you can do it over with a cup of coffee, or perhaps while taking a bike trip someplace. That is taking initiative, if she refuses your offer, you will not have to worry about her body language anymore
good luck!
ciao