just as the title says (:
Most Helpful Opinion
I know I'm a guy and you addressed this to girls, but I'll offer just one word of advice: text a girl when YOU want to, when you feel like it, without worrying about timing or convention. You be your own man, and let your relationships be on YOUR terms. Any smart, secure girl would appreciate that kind of confidence from a guy.
Better yet, forget texting. Call her.
Best of luck.