I'm A Silhouette (Gravity Falls fanfiction)

Another Gravity Falls fanfiction about Dipper feeling sad and depressed, and no one knows why. Mabel tries to get through to him but fails miserably, and Soos and Stan don't know what to do. Wendy started to notice his behavior, and feels bad for him. One night Dipper goes on a walk, and Wendy follows him, and hears him confuse why he is like this, and tries to help him.