What does no soy un amiga soy tu mujer mean?

Answer 1

This is an irony-laden sentence by a woman to her boyfriend or husband. She says, "I'm not a friend, I'm your woman." The correct adjective/article is una, not un.

Answer 2

"No soy un amiga, soy tu mujer" translates to "I am not a friend, I am your woman." It implies that the speaker wants to establish a romantic or intimate relationship with someone, rather than just being friends.