Though it could apply to men too.
If you like a guy, and he asks you out, just say "yes".
If you don't like a guy, and he asks you out, just say "no".
If you like a bit of chase, ok that can be 'fun' for a while. At least be straightforward about it. Don't send mixed signals. You can just play it slower and make them work for it. There is no need to say 'yes' to something and then backtrack. That's immature. For instance saying saying "yes" when he asks you out, but then cancelling 3 times in a row with progressively dumber excuses. If you like him, but don't want to go on a date yet, then suggest an alternative such as meeting up with friends. If you don't have friends then get some.
Now your life will be 10x more straightforward & help you sleep at night better. You're welcome.