I wont to be able to talk to my freind thats a girl more in a text?

me and my freind are close but i find myself sturggling to find something to talk about and then the converstaion adventually gets boring and we stop talking so if u can plex help me wih things to talk about cuz i like this girl and i just wont to talk to her more in school and over text i just dont know what to talk bout