First of all , i know it's hard to lose somebody you loved , and is hard to move on from it , cause you can't get used to that person missing , but you should be strong and happy for her , you have to be brave and to find yourself , you might have to understand that all people go and they won't be back. But just don't think about her , distract yourself , try to focus your attention on something else , find a hobby . Don't lose the sense of life , and remember just the best moments and memories with her , and he the way she'd like to see you.