The context of the following conversation is Jesse wiped the tears from Lee's eyes after they were talking about what happened to Lee last night.:
Jesse says I had to wipe the tears from Lee's eyes.  His dog passed away last night.  He was his best friend..
The friend responds It's hard to lose a dog..
Jesse responds Lee was so devastated.  His dog, Joseph, ran out onto the street and got run over by a car..
The friend responds That's tragic..
Jesse responds He was right behind it and saw the whole thing.  He blames himself for not being able to save his dog..
The friend responds It's not his fault..