It's like a lot of girls are one trick ponies and the only technique they have for getting a guy is to run away from him (and make him come after her). And if it works it works and if it doesn't it doesn't. But when they like you and you don't chase them they just give up because that's all they learned how to do. Not only that but since that's how they think it works, they'll assume you don't like them if you don't pursue because if they don't it must mean it was their fault lol

Any ideas on this?

Edit: What to take away from this is it's not always your fault. What if she sucks with guys as much as you used to with girls?