Thank you all for your responses!
Seems like there are mixed responses on the grudge part.
It sounds like she'll be fine then. I'll miss her just as much as she'll miss me since she is with me all the time. She's a very mellow and easygoing dog, so she'll probably be better off than a totally dependent dog.
I took note of all the things you said and will be sure to take care of everything I need to before I go. At least I know she won't be neglected, because my brother's friend is looking forward to playing with her, making her steak, and spending time with her. :P