We were at the mall when it happened. We had a great time but in the car she was quite and i asked her again if she was mad and she said "no". I also said sorry 2 times. Would you girls be a bit mad? Be honest please.
Look your supposed to only have eyes for your girlfriend. And sometimes us girls feel like it's common sense to at least not check someone else out in front of us. Like hello I know I check out guys but I'm not all obvious about it unless I'm with just a group of friends.
I think your girlfriend did get upset because of her silence, that was her uncouncious reaction. But let's be honest, men's nature is to look at what they like and telling a man "only have eyes for my butt" is like depriving him from his nature. It also shows the lack of confidence in the girl.
If I was her, I wouldn't get upset, in fact if another woman turns you on, it's ok as long as you don't touch and the fever ends in your sheets with your girlfriend.