You don't feel like you belong, you don't feel like you matter, you don't feel like you exist.
You have families yet you feel like you don't have any.
You are always there when they need you but nobody there when you need them. You love them unconditionally yet they only love you when they need you. They left you hanging by yourself when you no longer serve any use for them.
You are true friend to many yet you only have 1 or 2 or maybe none.
You exist but your existence doesn't matter enough for them.