You seem familiar.. (Freddy freeman X Fem Reader)

Y/N is the loyal sidekick of the one and only superman. She is supergirl. Her life gets messy with the justice league, so her brother Clarke sends her to Philadelphia to stay there for a while. She meets a certain boy who is obsessed with superheros, and may be onto her. Will he figure out her secret? Or will she fall for him and have to tell him anyway?