Can you be a true friend to someone if that someone  not acting honorably or is not being a true friend to you. Is reciprocity a requirement of true friendship?

A true friend does not help a friend to avoid consequences of wrong-doing. Rather a true friend will encourage and motivate you to do the right  thing within the context of accepting the consequences.

A true friend will not necessarily shun his friend who had done wrong. Rather, depending upon circumstances, the true friend may choose to walk with his friend through the midst of the consequences.