What does it mean when a guy will usually text you but suddenly didn't text you for a week?

I told this guy that I have 7 weeks more left of internship before I graduate, and he said he will try not to disturb me for these last few weeks and even told me to let him know if I need anything. After that, he didn't text me for 1 whole week...
What does it mean when a guy will usually text you but suddenly didn't text you for a week?
Post Opinion