Teen girls are just..

I was on train just now,
and i overheard this conversation between a couple,
reasonable looking a little above average girl and a quite handsome guy.

Guy: "how come you never reply my messages?"
Girl: "Aiya sometimes never see you message me ma, then sometimes even if see forget reply"
Guy: "Really meh, you like in class so free can facebook and blog then you never check handphone?"
Girl: "But i not only never reply your messages, other people message me also i never reply"
Guy: "huh where got such things, i always reply once i see your messages"
.
.
.
conversation continues and suddenly they both stopped talking and soon alighted.

Now, the girl is somehow reasonable looking,
shes not some Megan Fox or what model.
the guy is pretty handsome,
somehow above average.
im not saying you are handsome means you deserve more love,
but come on.
the girl is in a relationship,
what the fuck is it suppose to mean whereby "I also not only never reply you"
i feel like getting involved in the conversation and ask her shut the fuck up.
im just beyond pissed when i heard that after today.

Dont know what girls have in mind.