Co-dependency refers that a person especially needs others to rely on himself and always loves to provide others with care that they don't need. Moreover, this kind of person also forces others to accept his care, so that others can't be independent. When others rely on him, he will feel satisfied and valuable. This symptom will suppress people's nerves and bring a lot of inconvenience to relatives, friends and even colleagues as well.
According to the above definition, Mr. Liu lived in his own home from primary school to university does not belong to co-dependency.