Vuoi essere mia/mio?
Yes, mia means "mine" when translated from Italian to English. The pronunciation of the feminine singular possessive will be "MEE-a" in Italian.
mio - if using in a sentence such as the hat is mine or you are mine.
Sarai di nuovo mia
Πάντα να είναι δική μου (Greek)Sempre essere miniera (Italian)
"Mine" as a pronoun and "my" as an adjective are English equivalent of the Italian word mia. Context makes the choice clear. Regardless of meaning or use, the pronunciation will be "MEE-a" in Italian.
Ragazza, sei la mia! is an Italian equivalent of the English phrase "You're mine, girlfriend!" The feminine singular statement also translates into English as "Girl, you're mine!" according to context. The pronunciation will be "ra-GAT-tsa sey la MEE-a" in Italian.
"My daughter" is an English equivalent of the Italian phrase figlia mia. The feminine singular phrase translates also as "daughter of mine" according to English contexts. The pronunciation will be "FEE-lya MEE-a" in Pisan Italian.
Voglio che sia mia! and Voglio che sia mio! are Italian equivalents of the English phrase "I want you to be mine!" Context makes clear whether feminine (case 1) or masculine (example 2) gender suits. The respective pronunciations will be "VO-lyo key SEE MEE-a" in the feminine and "VO-lyo key SEE-a MEE-o" in the masculine in Pisan Italian.
"Mine from nothing" is an English equivalent of the Italian phrase Di niente, il mio. The preposition, masculine singular noun, definite article, and possessive translate literally into English as "Of nothing, mine." The pronunciation will be "dee NYEN-tey eel MEE-o" in Italian.
non vedo l'ora per voi di essere completamente miei
"You're all mine!" in English is Sei tutta mia! to a female, Siete tutte mie! to two or more females, Sei tutto mio! to a male, and Siete tutti miei! to two or more males in Italian.
Lui è mio! is a literal Italian equivalent of the English phrase "He is mine!" The declarative statement serves to illustrate a rule in Italian, whereby the possessive adjective is in the masculine singular -- in accord with the masculine singular subject pronoun -- even though the speaker may be feminine. The pronunciation will be "lwee eh MEE-o" in Italian.