* If "Pablo y yo" are the subject of the sentence and are doing the action, then the best pronoun is "nosotros" (we).
For example:
* Pablo y yo vamos al cine. (Pablo and I are going to the cinema.)
* Nosotros vamos al cine. (We are going to the cinema.)
* If "Pablo y yo" are the object of the sentence and are receiving the action, then the best pronoun is "nos" (us).
For example:
* Mi amigo llamó a Pablo y yo. (My friend called Pablo and me.)
* Mi amigo nos llamó. (My friend called us.)
In summary:
* Subject: "nosotros"
* Object: "nos"