Putting my cat to sleep

I’m 22, and I’ve had my kitty for 16 years. We are putting her down tomorrow. I just wish that she could understand what’s going to happen and that she could show me if she is ok with it. I know we are doing what’s best for her, but it really hurts that she doesn’t understand. She’s been with me through the hardest parts of my life and I’m really struggling with what’s about to happen. She’s never been really “cuddly” so I’m doing my best not to bother her too much. I’ve just been letting her sleep and giving her lots of churus. Just needed to vent and get all of my thoughts out, even if just to the internet 💜