It is necessary to have a healthy relationship with your siblings because one it will help you in the long run when you ever come across needing help with something you can call them two it helps your parents out if you are getting along with them and three they are your siblings you have the same blood basically and even though they might drive you crazy you know deep down they love you and you do too. It will just feel good inside and they could be like a friend to you. Another positive.