As instructors naturally become aware of their students’ attachment styles—this is an anxious student who is in my office every day, or this is an avoidant student who never calls me—you think about how you can tailor your advising style to meet their needs.
Attachment Theory Goes to Grad School.
You could also — with some gentle but firm guidance — expect them to learn to behave in an adult way, so that they manage their tendencies towards excessive attachment or avoidance.