Best friends or lovers? (Sorry for my bad English)

,,You make me so happy Nico" I blurted while I was laughing at his stupid joke
,,That's what are friends for, right" He laughed with me
And then I realized that I don't see Nico only as a friend.

This is story about basic girl with few friends. Then she'll start talk to a boy by an accident and they become very close friends. Everything seems fine until she realizes that she wants more than just friendship with this boy.