I'm sorry for your loss. I have never experienced something that tragic and devastating.
I've meditated on loneliness, it's a feeling everybody feels and I think it's important for us to feel this way as it encourages us to make new experiences with people. It's a disease best cured by simply being around individuals you like. In addition you will cure their loneliness as well. So finding some local friends might help.

You mustn't hate it, it's a natural feeling though I know it hurts.

It's going to hurt for long time, but grin and bear it for her sake.
One day that feeling will have scarred over.