<human>: Can you provide a brief overview of the text?

Hello Reddit,

I have been dating this girl for about 5 months now, and we've known each other about 5 years. Things are pretty great, and we have a fairly strong relationship. About 2 months ago she was at my side for the passing of my grandfather from cancer, and was very supportive. 

Now the shoe is on the other foot, she recently found out her dad was diagnosed with cancer (and although I am no doctor its fairly pronounced and spread). Naturally I want to be there for her as best as I can be, but unfortunately although I have lost people in my life, they were older and it wasn't unexpected. I can't imagine how she is feeling, because I have never gone through it before. She seems to have a "That's life" approach to it right now, but I feel like that is a front to hide her emotions. 

What is the best way I can support her through this? What is she going through right now? 

Any advice you can give me would be appreciated, Reddit.
<bot>: Girlfriend of 5 month's father was diagnosed with serious cancer, looking for advice on the best way to support her.