(La) Tristeza

Question 1

I'm sad because a friend of mine is going to live abroad and I won't see him as often.

Answer 1

Estoy triste porque un amigo mio se va a vivir al extranjero y no lo voy a ver tanto.

Question 2

When I see someone crying I always get sad*.

Answer 2

Cuando veo a alguien llorando siempre me pongo triste.*