By the time the final season of Pretty Little Liars rolls around, the world at large is going to be an emotional mess. Earlier in October, we already felt overwhelmed by the pictures from the finale script reading. This past weekend, Keegan Allen (the actor who plays Toby Cavanaugh) posted a snap of costar and onscreen love Troian Bellisario (Spencer Hastings). In the lengthy caption, the actor wrote a gushy love letter where he said such sweet things as "I have grown up with you and learned so much from you," "I'm a better person because of you," and "I absolutely love you Troian Bellisario." We've still got a ways to go until the last remaining episodes air, but as the impending character deaths, the big "A.D." reveal, and answers to burning questions loom ever closer, we can't help but dread the end of an era . . . and a final exit from Rosewood.