The Friendship Questionnaire is a 30 item questionnaire.
Items are scored on 0 -8 scale, with the total scale score calculated as a sum of the factor scores.
Mendelson, M. J. & Aboud, F. (1999). Measuring friendship quality in late adolescents and young adults: McGill friendship questionnaires. Canadian Journal of Behavioural Science, 31, 130-132.