So I was watching a video on MLB's original storyline, with Felix being cold and aloof, and being cursed by the ring on his finger to have bad luck. And it made me think...maybe Felix not turning Marinette down because he doesn't like her, maybe he was pushing the thought of getting close to anyone away because he didn't want to infect them with bad luck. If Adrien had that curse, it's possible he would react that way. So instead of his entire personality being changed, in reality it would just be his name and the curse that morphed to the 3d version.