I know this is sort of the opposite of what usually gets asked around here, but I'd really like to see some thoughts on this.

You meet a girl and initially hit it off really well and you can tell she's really into you, but as you get to know her a little more you realize she's not what you're looking for, and want to break it off but be nice about it.

And for the sake of the exercise can we please refrain from "booty call" and "FWB" etc. related comments.