Hi there. First, I want to point out that we do have a teen forum here at med help. You can go to the top where it says forums on the tool bar, hit that and then look on the left side of the page under T's.
When people are going through a difficult time, they often back away from the things outside of their inner circle and when you are 17, your inner circle is often going to be your immediate family and maybe a best friend. It is human nature and not meant to hurt someone. Please give her some space to work through her own emotions of a difficult time in her life.
Second, at 17, you are at a really critical time in your life. This is the time you are preparing for the next stage that hopefully includes college or specific career training. While I know boyfriend/girlfriend relationships matter---- fight any urge you may have to get too wrapped up in them so that you can focus on this important time in life in which your decisions can actually shape your future. good luck
She's had alot on her plate lately so give her some time bro--when the dust settles if she really cares for you which I believe she does then she will be back.