Am i over sensitive or what?

our friends had to put there dog sadie down a few weeks ago, health issues. they want me to come visit with my fiance' but i feel strange. sadie was our female pits best friend, and i know that if and when i walk through their door i will start to cry. i don't want to do that. i know that her pet parents have set up a memorial for her in their home( which is what i do expect), and that their moving on, but how can i? i loved their girl like my own, i don't want to cry in front of them. sadie would always come sit on my lap and give belly rolls. her eyes were beautiful, one blue, the other green. it's almost new years, any advice? and her mom owner has cancer, dad had a heart attack.