Why do you always do that?
you know you're beautiful don't you. That's why you make me suffer
It means "And why is that?"
Why do you ask that? or why are you asking that?
You should hate yourself for what you do.
Something missing in the question... As it is means "why you do with me" It could be "what are you doing with me" - "Que haces conmigo" Or "why are you doing that to me". "Porque haces eso conmigo"
si eso es todo lo que haces, no es mucho
por eso es que esta decision es muy dificil. -fluent speaker por eso es que esta decicion es tan dififcil.
because I always want what you can not
Por siempre sin importar que.
por eso es todo que yo se
Because we always want that which we cannot have
Por que me pregunta usted/preguntas eso? (accent on 'e' in 'que') (formal/informal 'you')