Abandonment issues are not a mental health disorder in and of itself, like depression, but it is a type of anxiety and, in some ways, a phobia. People who suffer from abandonment problems may have difficulty in relations because they are afraid that the other person would abandon them. Adults with abandonment concerns may exhibit various signs and symptoms like the individual being a "social pleaser" is continually trying to please others, not being able to trust others, and over-commitment in relations among other things