LTR is off to vacation, won't see her for a month. How do I manage this?

I don't want to constantly blow up her phone with dumb memes or funny stories because I understand you can't build attraction over the phone and you will only lower it.

But I also don't want to stop talking with her completely in case she doesn't initiate some form of conversation herself.

(We are both in high school if you are wondering why she's on vacation without me, and we have already spent 1 week on vacation together a few weeks ago.)