B can be a good answer but C is way better so C is your final answer.
Answer:
Hola, Ana: estoy feliz
Juan esta enamorado de mí.
Mis amigas, Carmen y Pilar piensan que él no me quiere. Creo que ellas mienten.
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You did not include the conversation
Answer:
Irse is the correct way to say go away in Spanish hope this helps