Personally I never understood this concept.If you can show her that other women are interested in you that can help to raise your value. As that can show you are in high demand and creates an element of challenge to you. So it helps when you are with her to look at your phone and be like "Sheila keeps on texting me...".
But also agree with a bit of a timeout to get your head in the right place where you are more detached from the outcome.
If I like a guy, I like him, if I don't, I don't. I don't need to see that other ladies are interested in him in order to be/become interested in him. I can only speak for myself, but if I tell a guy we're just friends, it means we're friends and nothing more. Then again, I don't play juvenile games, nor do I believe in messing around with other people's emotions. There are however people out there who will string someone along, etc.
The only advice I'm going to give is to simply be yourself. That way you'll know that if she likes you, she likes you for who you are and not because of all your strategizing to get her.