I think that although it is hard not to focus on the lose of her, try to focus on the time that you had with her. she was a gift from heaven, and although she has passed and you feel so much pain right now, you were blessed to have her, you were meant to love her, there is a reason why she came into your life, even if you dont know what that reason is. i think all you can do right now is to allow yourself to grieve. i wish you all the best.