Who is this? Is it some random broad that put you the friend zone or is it a guaranteed lay?
It doesn't matter how good-looking you are, how romantic you are, how funny you are... or anything else. If she doesn't have something INVESTED in you and the relationship, preferably quite a LOT invested, she'll dump you, without even the slightest hesitation, as soon as someone a little more "interesting" comes along.
Quote taken from The SoSuave Guide to Women and Dating, which you can read for FREE.