One of the main reasons why most men struggle understanding women is because females tend to communicate differently. Women use sub-communication while men often use over-communication.

When you approach a girl in the streets or in a bar she will rarely directly tell you that she is interested. You will have to read her body language, face expressions and voice tonality in order to know how she really feels about you.

When you express your interest on a girl and she declines your offers, makes an excuse or directly tell you the word 'Not' those negative responses often means that she is not really into you and you should probably move on but sometimes she will show IOIs (indicators of interest) during the interation and still decline your advances.

If a girl rejects you while showing IOIs and sud-consciously displaying signs of attraction you should be more persistent in the interaction and try a bit harder to convince her. Sometimes women dismiss your advances not because they aren't attracted to you but because they don't feel qualified enough for them to feel safe expressing what they truly feel about you. And sometimes they want to let you know that they are not an easy catch in order to make you realize that they are not promiscous and make you feel safe in pursuing a long term relationship with her.

Watch this video blog for more details about the topic:

https://youtu.be/o1fdHkrpX2M