What is he texts me every 3 days?

It is possible that the person who is texting every 3 days is trying to maintain regular communication with the other person, but may not want to come across as too clingy or overwhelming. This could be a sign that they are interested in maintaining a casual relationship or friendship. Alternatively, it could be a sign that they are busy with other things in their life and have limited time to devote to texting. It is important to talk openly with the person about their intentions and expectations for the relationship to avoid any misunderstandings.