What should I text to my friends?

Recently moved into a boarding school and made some new friends. From time to time I will be texting back and fourth with them which I really enjoy, but I’m really bad at continuing the conversation sometimes.

One of my friends complain that I don’t text her more, mainly when we go home during holidays. I want to write to her more but never know what to write. I find it awkward trying to start a conversation thru texting, especially when I don’t have anything special to write.

Any tips on what to do? What should I write?