Luffy X Reader Just A Nakama?

(Y/n) is the newest member of the straw hat pirates. She gets along with everyone and is fun to be around. Everything is going great until (y/n) develops feelings for her childish captain. (Y/n) starts being more quiet and not as social. Will she confess to Luffy? If so how will he react? (Y/n) wonders if she is just...