Moved this to the "Long Term Relationships" board.
R4L,
The issue with this is that it all depends on how you were texting her before you started the LTR. If you were texting her all the time and then you suddenly begin to text her less than usual, she will notice the change in communication and likely harp you about it. Unless you have a very good reason for lowering the amount of messages you want to send her, expect to hear from her if you change the flow.
In general, I run all my relationships now with minimal texting. All of my texting is usually light-hearted and fun, but it's almost always to set up logistics for something I have planned with my girl if I'm the one to text first. If she texts me about something, I always respond warmly and light-heartedly as well.
During my casual relationships, I also make an effort to not text back after long periods of time (especially if she knows I'm at work) so she doesn't get in the habit of expecting texts from me very regularly every few minutes. Even then, I'll vary my text times depending on what time of day it is and how busy I am. If I'm at work, I might not respond for 5 to 6 hours to one text. However, if it's a Monday evening and I'm home near my phone, then I tend to respond to texts within 20 to 50 minutes on average.
There's really no "set" way that you have to text your girl in an LTR. Keep in mind, however, that how you've been texting your girl during the course of your relationship is how she'll continue to expect you to text her as you get further along.
- Franco