Answer:
He's an introvert. In Spanish: es introvertido.
Explanation:
Él no puede hablar fácilmente con todas las personas y no tiene mucha confianza en sí mismo. Tiene una personalidad introvertida, esto significa que es tímido y le cuesta vincularse con los demás. Le falta mayor confianza y es posible que hablar con gente que no conoce lo estrese. In English this would mean: He cannot talk to others easily and lacks self confidence. He's an personality trait is introvert, which in Spanish is "introvertido". He's shy and finds it difficult to bond with others. He lacks confidence and it's possible that he gets stressed when talking to people he doesn't know.
