You are my beautiful sister.
no eres mi hermana
tu eres mi hermana
'You're welcome' as response to 'thank you': Con mucho gusto, mi hermana. De nada, mi hermana. A la orden, mi hermana. And as greeting to new arrival: Eres bienvenida, mi hermana.
It means "You are very specal to my sister" but is not very grammatically correct.
"Tu eres mi mundo" in English means "You are my world."
Tu eres mi amor means: You are my love
It means, "You're my heart, you're my love, you're my life."
Te echo de menos means "I miss you"A mi hermana menor means "To my little sister"
You could say "Eres mi rosita linda"
My sister
it means "my sister is the"
It means "With my sister and you".