Nothing is worse than having a girlfriend who cares about you and wants to be with you. It's much better to pine after a woman who shows complete disinterest no matter how many times you try in vain to gain her favor. 

The one positive to dating an "Overly Attached Girlfriend" is that when she gets tired of the emotional one-way street that is your relationship, you can shrug it off and claim "hey, she was a crazy bitch anyway."