I think they liked me..?

Okay this was in the morning. I was walking down the sidewalk, I'm quite tall BTW, had my backpack on. And I get to a kinda complex street (lots of restaurants banks etc) & I walk past this particular restaurant & I see these 2 blond girls (I don't pay attention to them) so I walk on alittle more & I have my earplugs in my phone listening to music & I thought I heard something..so I turnd & saw 1 of the girls was sitting in the car the other was saying to me "Hey have a good day at school!" smiling & having her hand up & I responded "Thx!" & holding my hand up also. After I crossed the street still bewildered. I don't know if its the clothes I'm wearing or I'm just plain attractive. Everytime I wear this grey long sleeved shirt & grey tie I seem to get attention SOMETIMES if I can remember. Did they like me?