When you don't give them the time of day, or they don't know if you're interested- that's when they get curious.
But here's what I've learned about dating the guy that's "Hot and Cold." The second someone goes from infatuation to hesitating with making plans- those butterflies you felt at the beginning are all of a sudden replaced with tension and then you're on edge and you feel like you can only relax when you're with him- and that's because you never know when that will be. The second you put your life on hold waiting around for one man, you end up giving him all the power.
When the other pulls away, the other one fights to pull them back. Someone who is capable of honest/consistent behavior will always communicate the underlying issue. A high value woman won't let a man push her around.
One who initiates is the one who is the most terrified. If you feel like a guy is giving mixed signals/stringing you along- talk about it and ask him what his intentions are. A high value woman is not a woman he can take advantage of.
Many women get treated like an option instead of a priority- which makes people lonely because they don't let themselves care enough about a person to develop a true connection. The relationship can't progress because they keep undermining it, they're inconsistent- or become consistent at being inconsistent- training you to expect less of them.
No point being with someone hot and cold because it's not mutual- it's all on their terms and you never really know where you stand.