Good friends or more?(ON HOLD)

This is my first time writing a fanfiction and I don't know how it will go,but we'll see.
Sooo this story is about Kat ,Dom and Alberto.
So Kat and Alberto are dating and they both got auditions for a show called Shadowhunters.Kat got the part of Clary and Alberto got Simon's part and the play bestfriends.And then they find out that Jace is going to be played by Dominic Sherwood.Kat and Dom have met before,they're are good friends.