How was it too late?
Well for me, when it comes to guys, Im dense.
Pretty much because I DONT want them flirting with me, so either Im ignoring it, or not even looking for it.
I dont know where this happened, school, whatnot..
But I find that if youre in a group of people, this person pays more attention to you, talks to you first, or more.
Kinda creepy sounding, but you find them staring at you at random times.
They do things for you, give you things.
They make it a point to touch you when talking to you, shoulder, arm.
Theres more, but its early for me for a day off. xD
This dont apply to all people, were all different and we flirt differently. xD
Were you already friends with this girl?