For all the nice guys out there:

You're awesome. Great. Amazing. A really good person.

But if you don't want to be put into the "friend" category, you have to flirt. You have to create a little bit of chemistry.

Use innuendo, double entendre, whatever. Because I promise you, if you don't do it you will be put into the friend category. And the longer you're there, the harder it is to get out. The only thing that separates friendships from relationships is sex. You have to create chemistry if you want to put yourself into the "relationship" or dating category. Otherwise you'll just be friends.

And no, this isn't about anyone in particular. It's just something I've noticed along the way.

Any other ladies out there want to weigh in on this?

Update: Here's a guy weighing in. Pretty cool (and, I think, accurate) blog post.