University on summer break in a week.

Tried to hang out with a plate but too busy with finals. I would only text for logistics but since im leaving in a week.
Should I mention to keep in touch over the summer? it sounds like some 8th grade yearbook shit but idk how to word it. I also dont want to start texting them move often, creating other issues.
I understand that I should focus on the plates in front of me, and i do have some back home but want to maintain the ones at school, when i come back