Bottomline: A female that is in love and has high self-esteem cannot be seduced.
Only a hungry fish will eat the bait.
These types of females are easy to talk to, fun to be around, and she may even help you, but really has no interest in anything further than friendship. She may cause a lot of men to like her, but you really have nothing to offer when she is not looking.
She may even approach you and start initiating a conversation with you. That doesn't mean she likes you.
A women approaching a man is not a good sign and does not indicate she likes you. If you attempt to pursue based on the fact that she initiated, the likelihood of you getting turned down is higher. You most likely end up being her friend.
Simply put, a woman can only be seduced if she wants to be.