Hmm, well, I hope you text more often than what you post here.
Not that it matters but how does someone be a member of a forum for 3.5 years and have only THREE posts?
I am assuming you are not the type to bombard.
Just send her another text, something meaningful but short. There isn't much rule to how often but i would imagine twice a week is safest. It is no where near too much and even if it is too little, you two can rev up communication frequency later.
Always remember that YOU are the most important person in your world.