Text messaging , or what ?

A girl who pulls out her mobile phone and pretends to to be busy sending or reading something on her cell is trying to say what to the guy she is ping by every time he pes by her on the sidewalk, the guy happens to be me :).She does have a deeply engrossed focused expression on her face . I have never seen her talk on her cell at all .As soon as she pes by me she pockets her phone .All the other girls usually go yak yak on their mobiles , not this one she is stunningly beautiful.Am I reading to much into her signal ? Is she telling me she is busy or is she saying call me ? Should I change my route ? Need help