You two are neighbours that eventually became bestfriends.

Felix was back from oxford and you were excited to see him.

Now, you two are walking through a park. Joking and laughing. When you were telling a funny story, he suddenly spoke, "I love you, ever since I've laid eyes on you. Im falling deeply, inevitably, hopelessly in love with you. So please give me an answer because I cant go on like this any longer." You were speechless, you've always thought of Felix as a friend