My girlfriend said she needs a break........

I know how you feel. I think the best thing that you can do is get busy doing something that will keep your mind off her. First of all, just tell yourself that if you keep nagging her, if you don't give her the space that she needs, and if you keep texting and calling her, she is just going to pull back farther. You will push her away! Trust me! When a girl says that she needs space, give it to her or you will lose her for sure!
Find something else to do when you are thinking of her, look through questions here on webanswers and answer what you know, that will keep you busy!