What do people mean “grief never goes away, you just learn to live with it”??

I mean, in my mind, you might as well just tell me to die. My dog is dying, and I’m hurting so so bad. What do you MEAN this doesn’t go away?? I just have to live like this? Fuck you! Fuck you, fuck you, FUCK you!!

I can’t live like this. I’m going through so many stages of grief at once. I’m about to lose my shit.