In the example below, Sawyer and I/me are acting as the subjects of the sentence.
Sawyer and (I or me) have been married for three years.
(Tip: Cut out "Sawyer and" and see which pronoun sounds right)
Correct Answer: I
In this example, "she" is the subject because "she" is doing the asking. Lisa and I/me are acting as the objects.
She asked Lisa and (I or me) to be bridesmaids at her wedding.
Correct Answer: me