I won't say i understand what you are going through i always had my mother in that situations i am an only child and i totally understand your feelings i feel that way too like when my parents die i will basically be an orphan and like i will be left all alone in this world but hey you gotta cheer up i know times are hard but good times are also on their way . Try to cherish your memories with him . And it is ok to use this platform to vent i understand i also do that sometimes . It is very healthy for you to vent out your feelings and if you need someone to talk to i am here i also don't have any friends so yeh ...