Grayson definitely wasn't over Emily despite the amount of nights he spent attempting to convince himself of it. Something deep in him just... couldn't get over her. It ruined whatever he tried to have with Avery which was why Jameson was with her now. So, when a girl shows up to the Hawthorne House, looking exactly like Eve, he very obviously became attached.
You, being a childhood friend of the Hawthornes', knew that this wasn't right. At all. Especially because of everything he went through with Emily already. Eve was horribly shady and her motives were so unclear that no one seemed to trust her except for Grayson because of the simple connection.
He rubbed his temple in frustration as his grey eyes steeled when they looked at you. Grayson was already insanely stressed and tired and when you came over to his room voicing your concerns, he was done.
"Holy shit! Do you ever shut up? Get the hell out of my life- I don't need you! Goddammit." Grayson was so done.