WOOHOO! I FOUND IT GUYS!!! I searched for it everyday coming home from work and FINALLY! :
Who Needs Air (https://www.fanfiction.net/s/4189525/1/) by wanderlustlights Summary: "It was sickening, and Harry hated it. Hated that someone could have such an effect on him without even trying, hated that he felt this way about someone when nothing had even ever happened between them. Disgusting. It was like the blond was a disease.HPDM"
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I searched for it everyday coming home from work and FINALLY! :
Who Needs Air (https://www.fanfiction.net/s/4189525/1/) by wanderlustlights
Summary: "It was sickening, and Harry hated it. Hated that someone could have such an effect on him without even trying, hated that he felt this way about someone when nothing had even ever happened between them. Disgusting. It was like the blond was a disease.HPDM"
YAY!