Understandably citing her history and how her experiences with saying those three little words meant that she couldn’t say them now, she’d expressed that she loved him without actually using the L word.
In the final scene of the episode, when the call center was overrun by the men with guns, Maddie was on the phone with Chimney, who had confessed his love earlier in the episode.
It seemed like a sweet but throwaway moment, but it came back with a vengeance when Maddie did something that may end up saving her life as well as the lives of everybody in the call center.