While you, Felix and Yuna are walking towards the school, you keep seeing Felix glancing at Yuna

You've seen him being around with Yuna, Is it perhaps that Felix likes Yuna?

You like Felix but Felix likes Yuna, while Yuna doesn't like him back because she knew that you like Felix

You're hurting inside, even though you're in pain. You chose to smile and stare at Felix finding a way to put his arm around Yuna's shoulder, while Yuna is backing away secretly