Thank you all for your advice, help, and support. It really meant a lot to me and helped me get by the last week or so.
I am now back at home and she is back in England, and that's it. It's amazing how it all feels like a dream now and I am feeling confused and a little isolated, but I know more than anything I have to remain positive and look forward in life. Today a picture of her popped up on Facebook on her first day back home in England and she was wearing a jacket I bought her as part of a Christmas present...but then I caught myself: why was I being so sentimental and dramatic? It would have hurt so much more to look at before, but I think more than anything I've realized that if I let the little things get to me, nothing good will come of it. Things have gotten so much better.
Thank you everyone