In my opinion people that suffer from hoarding disorder ARE LONELY. Every single object in house, that is full of stuff, means a good memory, a special feeling of that past moment that is close to heart, but what you don't have at present (happy time with friends when you were younger or girlfriend, wife - that is not here anymore). If you were in a music band when you were young, played with a guitar and it was best fun days in your life and you lack of fun days like that today, but you think that it is impossible to have something as fun as it was today or in future, you will probably start buying one guitar after another and by doing that experience buying something from that fun past, attach those memories to this new guitar. Will it be easy to let go of that guitar without admitting that past is past, let it go, live today, value what you have today? Life in 5 years can change more than you think. You create it. So I believe that people with this disorder lost a loved one, or life is not as it used to be, so they attach to material things that remind of pleasant moments in their life. But getting New stuff is creating new fake happy emotions (multiplying that was good), and I repeat myself - from being lonely. They probably spend time alone when they get that thing. That is why it is hard to let go to all of those things in the house (they are attached to your heart). People with hoarding disorder can't let go of their past, live attached to it and don't live in this moment or expectation of what new great fun, full of people future they can build. Start loving yourself and new people will start want to be near such person. How much you respect yourself, only at that same level you can respect other human beings. That is why people avoid ones that don't respect themselves. Loving yourself is higher stage. Start new page in your life. Love yourself. What you would love your life to be like if there were no boundaries, no limitations (first thought is usually the most right one)? What is the most important thing you must do in order to make that shift? Ps.: I have no degree in Psychology, just my opinion on what I wrote. I attached to stuff myself when I was young, when I was at school.