<human>: Give me the gist of the text in a nutshell

OK this is cutting me up too much now to deal with. Me and my girlfriend are going out 9 months now, we didn't have it easy from the start and partly broke up over the summer but since September things have been going OK except any time I've tried to make plans she agrees but later on her, they fall through.

The latest is she's gotten really close to a new friend and now he's leaving home to America, she's broken to bits over it, physically crying, tomorrow we where to celebrate our 9 month anniversary and she's pretty much canceled, I couldn't see her over the Christmas and we had this planned for a while, I was looking forward to it alot but any time I look forward to something with her it always falls through and pushes me back into depression. I've always had trouble with emotions. 

She's only recently started talking to this friend since the last two months but he's clearly showed interest in her wanting more than friendship, they flirt, he's offered for her to go to his often and asked for dinner and regularly made comments like he'd come pick her up and regularly comments on her looks. 

Shes talked to me about him every day, I didn't want to stop her or upset her even though its constantly hurting me, it feels like emotional cheating if that's even a thing. I don't know why I'm posting this here, I guess I've no one I trust talking to and I just want to vent,
<bot>: girlfriend cancels plans I make well after I'm excited for them, usually day before, also emotionally attached to other guy