Kids always complain that they're bored. If she's bored she needs to do something about it. Read a book; do some drawing; play in the park. One thing I haven't missed this week are the teens are school and their "I'm b - o - r - e - d"" wingey-whining.
In what way does your girlfriend mean 'stop being an a-hole?' What're you doing that she sees as making you one of them?