<human>: I've (24,M) been dating my fiance (25,F) for almost 2 years. We've had a few arguments over the past few weeks, but nothing too big. Mostly financial or usual relationship fights. 

Lately she's been very hostile towards me saying things like "I'd do anything to make you go away and not come back" or just "I hate you". Whenever I try talking to her she says she's pushing everyone away, but I'm the stubborn one who wont go away. Around this time last year she lost her grandfather (who she was very close to).

I have a 3 year old son, who loves her, and for the past two years we've considered ourselves a little family. 

She has Addison's Disease and its gotten so bad that she's had to go to a doctor recently, but I'm not too familiar with the disease to know if its causing her hostility. 

Please, guys. I love this community, and I know your advise is usually incredible. Help me know what to do.

Give me the gist of the text in a nutshell
<bot>: Fiance (F) has recently gotten very hostile towards me and claims she's pushing everyone away to be alone. Not sure if holiday depression or complications from a disease she has.