Should I be worried that she didn't message me back?

[James]

I did some little flirting with her on facebook for like a week (I liked her new profile picture, we had a poke war, commenting random google images on her wall for like an hour lol, etc) and then Monday she poked me, and I poked her back, but now she hasn't poked me again since the (she's usually almost never on during the school week though, last week was weird). I wanted to ask her to hang out this weekend sometime, so then two days ago (Thursday) I saw her on and I said "hey loser" to her on chat, but she didn't reply and it turns out she didn't even see it until last night (Friday). Should I worry that she didn't message me back? I mean I wouldn't message someone back a day late if they just said "hey," so I don't think so. And should I try messaging her again tonight or should I wait a day or two longer?
Thanks
PS I know that just because I flirted a bit with her doesn't make her mine for the taking, but it just seemed weird that she abruptly stopped all contact. And I know that this should be a pretty insignificant thing to worry about, but I just really like her, I guess.

Oh yeah and a few weeks ago something similar happened where I sent her something and she didn't reply and then that time she replied 5 days later. Although that actually had something to say, it wasn't just "hey" (I sent her a picture of a turtle and told her it looked like her...she seemed to think it was really funny. That was the first time I really flirted with her.)

[Novelist4679]

Brotip: If you over think things you'll probably end up creating a problem that wasn't there in the first place.

[Redmastif]

I know a kid in my school who says the same thing to this girl he likes every time he sees her. She ignores him for obvious reasons. His fantastic line? "HEY NOOB!"

You might have turned her off with that.

[Sikko]

Well, I guess you should wait two days, then send her, and this time you have to make sure that she is there when u chat, so she won't have any excuse not to answer back,, I don't think you've done anything wrong,, if she likes u , she will answer )

[godiva]

Just a hint... Not everyone hangs out on fb forever... She might be like me & most of my friends... On sporadically, sometimes a month goes by without going on there, then a rash of days where you are on lots.

Definitely don't imagine issues where there aren't any :-)

Have you tried asking her out for some face to face time? Coffee? Movie? Dinner? Walk in the park? To a play or sporting event?

Try ;-)

Good luck!