Why girlfriend always yaps so much and she expects me to listen?

Well, of course she expects you to listen stupid!! Shes your girlfriend. Think about it. Why arent you listening to her? What makes you tune her out? If you find yourself getting distracted easily, just try to add something to the conversation. Don't stare at her blankly like you don't care! As for the yapping thing, give her a break. Us girls have soooo many things we like to talk about. And since you are the boyfiend, you should be expecting alot of it. Be happy that she wants to even talk to you about things and if you want quiet time, fine. Just dont come off as rude when and if you ask.