You saw Edward spending time with Alena earlier. Despite knowing that they were just friends and that Edward didn't like her that way, you saw this as an opportunity to make him annoyed and create a distant for the two of you. When he visited you, you started to gaslight him about it, but despite what you did, he still saw through your attempts and keep loving you.

“I never said that. If i meant that i would've said that, i said we're just arguing about something dumb, you're not dumb.”