<human>: I am an M (19) and she is an F (20). We have been together three and a half years and when she left we were both very much in love. I was actually in the process of moving into her apartment while she was gone (as we had agreed). She has been gone for 6 weeks now, and doesn't get back until next week. 

Her plan was to backpack through central america with her friend (also F). About 10 days ago she said she was no longer travelling with her friend, and was instead travelling with some people she had met on her journey. Around this time she started to send emails about how she was growing and changing and becoming happy within herself and no longer relying on me for that happiness. 

About a week ago she tells me her plans have changed and she is going to leave central america and get a plane ticket to kentucky to be with one of the guys she decided to travel with. 

After a week of trying to express my insecurities without appearing mistrustful (and being placated with I love yous and so on) I asked her directly on skype. She told me she has been fucking the dude she is staying with. She is staying with him for the next week, until she leaves. She did not apologise, she said she would not apologise for something which she did not regret. 

She said she plans to move out of the apartment I have just been moving into.

She says she loves me, but she also doesn't know how she is going to feel in the next few weeks.

I feel absolutely shattered. There is a LOT I want to discuss with her when she gets back, but that is still one week (minus about 6 hours). 

So, /r/relationships, here is my question. How on earth am I supposed to deal with the next week? I feel absolutely shattered and have no idea how to go on. 

And secondly can this relationship be mended? I honestly hope very deeply that it can. 

E: throwaway account for obvious reasons.

Can you summarize the given text in a few sentences?
<bot>: Gave her parents the key to her apartment, they immediately knew. Sent her a single email saying that if she feels no remorse then I will not be here when she returns.