I'm going to miss my aunt's funeral
Are you going to miss the funeral for a reason?
I still can't get over the fact she died.
It can be really tough to go to the funeral of someone you loved, especially if you haven't fully accepted their passing yet. But part of going to a funeral is coming to terms with the loss, and it may be helpful for you to go. If you don't go to your aunt's funeral your family will wonder where you are and they may be disappointed.
I don't care about people getting disappointed but I don't want to see her dead.
I am sure your family will understand how hurt you are and realize you need some time alone to process it. You should give them a heads up that you won't be attending though to avoid any confusion.