I have never texted, but I have seen people do it and it just seems to me that it is very habit forming and time consuming. And I see the younger crowd doing it constantly. I am very on the fence about wether it is healthy or not to be honest.
I have seen good things about it though, as I have seen my daughter work and occassionally test with a friend to cut the stress. As long as someone isn't tied to it all day perhaps it is ok.

A text girlfriend? and for what? Sounds strange to me.