Girls, What does she mean that she is not sure where she sees us long-term?

[Anonymous]

I've been out with this girl 4 times now. First date was drinks, 2nd was brunch, 3rd (if this counts) I took her to the airport the day before Thanksgiving (I saw it as an opportunity to be nice, get to know her further during the car ride, and just keep the momentum going) and the 4th date was at a nice restaurant which she loved. I kissed her when I dropped her off at the airport (just a peck on the lips), and then after 4th date dinner we had a nice passionate kiss. However despite this, she tells me at dinner that she finds me handsome, fun, and likes me (awesome!) but then she says she doesn't know where she sees us long-term? Wtf? Totally confusing. Any ideas?

[HOAAH]

She might not know if she is really serious about you. She likes you enough to just keep hanging out with you, but she isn't sure if she should pencil you in as a for sure keep forever as my boyfriend in a relationship kind of guy. Keep talking to her and ask her why.

[laurapalmer]

Honestly four dates isn't really enough time to determine if you wanna be with someone long term. If she's like me she probably just takes it one day at a time.