Not sure if this is common practice, but it worked for me, you guys have probably already tried this before, but I thought I'd share anyway.

Okay, I've been talking to this 22 year old girl, off and on, then she started calling me whenever she had a bad day or a problem. Ofcoarse when she did this I would keep the conversations as short as possible, but obviously she was starting to think of me as a friend of her's, totally not cool.

Anyway, she calls me yesterday(I hadn't talked to her for about two weeks, no text, nothing), and we're talking, I bring up that I've been talking to this 19 year universty cheerleader, which I have. It was pretty easy to tell that she didn't like that, at all. So she asks me out for a coffee. I say "yeah, okay, I've got nothing going on tonight" I left her place at 1:30am this mourning.

Anyway, I figure if you start feeling like you're entering the friend zone, cut all contact and when they contact you don't hide the fact that there is other women.