You know, people who lack the ability to connect with others may have a some emotional detachment issues.
That's right. Emotional detachment is the avoidance of emotional connections. That sounds like a lonely condition.
Very much so, as well as a means of coping with anxiety by avoiding certain situations that trigger it.
It can also be a reaction to a chronic condition such as depersonalization disorder. It is definitely a coping mechanism.
Traumatized people subconsciously mutes their emotions in order to protect themselves resulting in the socially withdrawn behaviors.
Depersonalization is a condition where people feel detached or disconnected from themself. I would hate to have that condition.
 There are many causes of emotional detachment disorder and it manifests differently for everyone.
rather than an inability or difficulty in doing so, typically for personal, social, or other reasons. In this sense it can allow people to maintain boundaries, psychic integrity and avoid undesired impact by or upon others, related to emotional demands. As such it is a deliberate mental attitude which avoids engaging the emotions of others.
This detachment does not necessarily mean avoiding empathy; rather, it allows the person to achieve the space needed to rationally choose whether or not to be overwhelmed or manipulated by such feelings. Examples
Emotional detachment
In psychology, emotional detachment is the inability to connect to others on an emotional level, as well as a means of coping with anxiety by avoiding certain situations that trigger it. It refers to the evasion of emotional connections. It may be a temporary reaction to highly emotional circumstances or a chronic condition such as a depersonalization disorder.
Emotional detachment can be a positive behavior which allows a person to react calmly to highly emotional circumstances. Emotional detachment in this sense is a decision to avoid engaging emotional connections,