I'm refusing to buy my girlfriend drinks.
Why won't you buy drinks for someone who is your girlfriend?
I know her too well. She doesn't buy anything when we're together. I've seen her in action
Even though it might be nice to buy things for your girlfriend, you don't have to. It is okay for people to buy things for themselves.
Yes but it's all the times she acts like a little bitch when I try to buy things for her.
Hey look at it this way, it is saving you money. If she does not want you to buy her drinks, and you do not want to buy them, it sounds like a win win for the both of you.