When Will it End?

My Grandma and I were really close she and my Grandpa lived in our basement and everyday I would go down and hang out with her then she had to move to a home, because of her parkingsons, and I didn’t see herr as often and it was hard seeing her there, unable to move, eat, or talk. A year later she died and it was the hardest thing I have ever gone through she was my best friend and now I will never see her again and I hurt all the time everywhere and it never stops it’s been about a year now and everyone seems totally fine and here I am in so much pain and in never subsides. I want it to end I want to forget her and everything that could ever cause this pain again to just go away. I’m scared of getting close to people now, what happens if they leave me like she did? what happens if I never get over my grandma and I feel this pain forever? when will it end?