How can I prepare to deal with the death of my dog?

I just cant stop crying. It hurts so, so, so much. She's been my best friend for years and she's helped me through everything, and I don't know how I can go on without her. She's not going to be cuddled next to me every single night, she'll be dead, gone forever, and I don't know how I'm going to be able to deal with that. I'm her best friend and she's mine, we do everything together, and I have no idea in ******* hell how I'm going to survive without her. I'm just going to be left with a house full of dog hair, alone, reminiscing over my dead best friend and left with a house of her memories.