First off, I am so sorry that this happened. There are some girls that make me ashamed of my gender. Hugs, and lots of them! I've been in the same situation, and it is no fun at all.
Her going away is probably a good thing. It'll give you the space you need to get perspective on the situation. With her around, dating this other guy, you're not going to make a whole lot of progress. It's terrible what she did to you, and until she leaves, it'll be hard to focus on anything but the betrayal.
If you want to be her friend, be her friend. If you want to be more, wait and see if you still feel the same way once she comes back. Don't sit around and wait for her, but take the time to know yourself so you know how you feel once she's back.
Lastly, more hugs! If you need to talk or rant or anything, I'm pretty much always around.
Her going away is probably a good thing. It'll give you the space you need to get perspective on the situation. With her around, dating this other guy, you're not going to make a whole lot of progress. It's terrible what she did to you, and until she leaves, it'll be hard to focus on anything but the betrayal.
If you want to be her friend, be her friend. If you want to be more, wait and see if you still feel the same way once she comes back. Don't sit around and wait for her, but take the time to know yourself so you know how you feel once she's back.
Lastly, more hugs! If you need to talk or rant or anything, I'm pretty much always around.