The collection starts to become an entity of its own and your needs are fast becoming subservient to its needs. Your life now becomes totally focused on feeding the Collection and making sure that its growth and eventual total domination are not hindered in any way. Any suggestion from others to clean up or reduce the Collection is seen as a direct threat to the Collection and therefore is adamantly rejected. You become the only one that understands the Collection and it in turn becomes your only friend. At this point, whole sections of the Collection must be reorganized just to access the bathroom or open the refrigerator.
Whole rooms become inaccessible and eventually forgotten.
Hallways now become the sleeping quarters because the bed was taking up too much valuable space. Windows no longer bring in sunlight in because they are blocked. The air becomes stagnant and musty. Doorways become blocked and covered over. Eventually any passage to the outside world becomes inaccessible.