You were spending time with Twilight Sparkle since it's been a while and you finally came back from the Crystal Empire. So of course she would want to see you. Things have changed so much. She's a alicorn princess while nothing much changed with you. It made you feel a bit sad that you couldn't change as much.

Twilight Sparkle: "Hey you okay? You seem really down but don't worry. I know I can cheer you up right? You doing okay? Your normally never this quiet."