Women often like things we men don’t think are truly important such as memory, details, signals and politeness.
So, when you are with your girl try to Pay her attention. Although is difficult if she has big boobs or nice ass or a great face.
If you want to have sex with her, pay attention to her conversation and make questions about what she is saying so she thinks you are interested in her. Remember women have many options so, try to be her SEX option
Good luck!