Their Fears and Problems (Levi x Eren)

Eren in worried about turning into a titan and not being able to control himself. He fears he will hurt the people around him. Will anyone be able to help him through this? Well there is someone but will he be able to without faltering his fierce grey stone faced stare? Or will things unravel and will he express his true feeling to Eren, or just scare him off with his usual unfaltering bored or angry expressions?