I was wasted while driving tonight and I got pulled over
Are you serious? Why would you drink and drive?
My girlfriend and I went out for some fun and we were drunk.
It is recklessly dangerous and illegal to drive when you are drunk, and the police were justified in arresting you for doing so.  If you are going to go out and drink, you should have a designated driver who can get you home safely, otherwise you would endangering yourself and others.
I was just having fun. WTF?
It may have just been fun for you, but you could have seriously hurt someone easily. You should never drink and drive under any circumstances.