I lost my mother 6 years and 3 days ago (June 8, 1998) after a long (10 year) battle with breast cancer. She was only 75 - just way, way too young.
I know that your are hurting more than anyone who has not been through such a loss can imagine - that's the way it was for me. I also could not imagine how the hurt could go away and was helpless as to what could possibly ever make me feel better.
The answer as so many told me was just time. Not that you ever stop caring or missing them but the pain just lessens a little each day (sometimes it's just a very, very little) until eventually you can think of them and remember the good times and find joy in those memories without being overwhelmed by the grief.
Be so thankful that you had such a wonderful relationship and that she knew how much you cared. That will be a comfort to you as time passes. I realize that nothing is really a comfort to you now. The grief is just too raw right now.
Tricia