"Justin loves American cinema, but I don't."
Translation:Justin adore le cinéma américain, mais pas moi.
Duo would be in error giving aime as an option for 'love' when referring to a "thing". Be careful relying on the suggestions from the drop-down menu, okay? Sitesurf is your better choice as an authority for word definitions, than is Duolingo's drop-down menu. Bonne chance. :-)