Trying to Understand A Girl as Someone with Asperger's

There is a girl that I know that I think is checking me out when I see her. This does not bother me however when I try to talk to here she just looks at me and does not say anything. I can ask here to talk to means she chooses not to. That is her choice and  I can replace that. I am confused as for why she keeps checking me out. I am trying to understand why she looks at me the say she does. I think she wants something to change however I do not know what. Is he does why does she keep checking me out? All I want is to have an open convention with me.