Attachment disorder is when a child has a really hard time connecting with and trusting their caregiver, like their mom or dad. Sometimes this happens because the child didn't get enough affection or attention when they were babies, or because they went through a lot of different caregivers and never really got a chance to form a close bond with anyone.
The child with attachment disorder might act out in different ways, like being really clingy and needy, or pushing people away and not wanting to be close with anyone. They might have trouble behaving properly and may act very differently with different people. This can make it hard for them to make and keep friends.
The good news is, with the right kind of help, children with attachment disorder can learn how to trust and connect with their caregivers and other important people in their lives. It just takes a lot of patience and understanding from the people around them.