Two years ago, my cousin killed himself and dreamed about him couple of days ago. What does this dream mean?

In my dream, he dug himself up his grave site and walked to his dads house. His body was purple, and his lips and eyes were black. When he got to his dads house he went and sat by the heater and out of the blue he was at my parents house. As I walked in my parents house, he was sitting next to the heater, he was shaking and shivering and he said to my mom, "I am so cold, I need to thaw out and be flexable again." My mom was thowing gestures telling me to get out of the house, so I went out freaking out. I went to get help and a few poeple came to help us out. The guys who were there freaked out and knocked him out and put him back in his casket. After putting him in his casket, we buried him after locking the casket up. A few hours after we buried him, he dug himself out again and I woke up after that. What does this dream mean?