POLL: "most guys wouldn't notice that"... was she flirting or what?

alright there's this super hot girl in drivers ed. we started talking at the first cl and then since then we've been talking the whole cl (she laughs alot) and hanging out separate from everyone else during the break. so we walked over to the gas station to get 2 Arizonas in the break and when we get there she was a little ahead of me so she opens the door (because i wouldn't let a girl get the door for me) i held the door and she went through saying thanks (haha even though she was actually holding the door for me at first). i made a crack about that "hell no i wouldn't let a girl get the door for me" not like in a mean tone like playfull and all, she laughed and everything and went on to say that most guys wouldn't notice that... what did she mean by this? am i just being hopefull or is it possible she was flirting with me?