Is she just nervous?

There is a girl I have been seeing around my apartment complex for a few months now. We both are constantly making eye contact with each other from far away but have not spoken yet. Whenever I get close to her she looks the opposite direction or acts like I am not there. I gave her a wave one day and she smiled and said hey. A few days after that she started walking by my porch where I always sit and she would look at me then look away quickly. This lasted a few days but now she is back to ignoring me when I get close and has stopped walking by my porch. Is she just nervous and wants me to approach her?

Is she just nervous?
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