To begin with the title: A person with proper Swedish language do not write: "va ä du?" it should be written "Var är du?".
Text.
although few words it sounds like an immigrant with very few Swedish lesson, who wrote it.
"oj var är du? Jag längtar dig mycket" will be translated as "gosh, where are you? I long you much."
Could this be a joke or a person with severe dyslexia?