This is the 453rd most frequent Hebrew word.
אותך
"You" (direct object, singular).
Here, 'אותך' is the object of the sentence, referring to the second person, singular, counterparty of the love.
אני אוהב אותך.
I love you.
'אותך' is used here to establish the person who is the focus of the boss's intended communication.
הבוס רוצה לדבר איתך.
The boss wants to talk to you.
In this case, 'אותך' refers to the direct object of the verb 'see,' specifying the person observed.