My dog just died.

My dog just died. My 4 year old son found him dead in his bed this morning. He was 12 years old. He was my baby before I ever had a baby and I loved him so much. I'm 36 +4 weeks pregnant and I know I'm more emotional right now but I'm just so sad. I posted on Facebook and 2 people just said to go get a new dog from the animal shelter! I don't want a new dog! Can't I just be sad about my dog dying without people telling me to replace him? I don't want to replace him. He can't be replaced! I just miss my old friend.