mi primo Nina esta enferma
prima = cousin who is a girl primo = cousin who is a boy
You could say "No mucho, primo" (Prima for a female cousin)
De tu primo(a)
primo Juan
hola primo
You could say "¿Conoces a mi primo?"
primo nino
la cousine
If your favorite cousin is a boy, you would say: "Tus primo favorito" If your favorite cousin is a girl, you would say: "Tus prima favorita". In Spanish, masculinity is represented with an "o" ending, and femininity is represented with an "a" ending.
la maison de mon cousin (a boy cousin) / de ma cousine (a girl cousin).
¿Todavía estás enfermo? would be the best way to ask "Are you still sick" in Spanish.
estoy enferma-o