A 56-year-old man presents to the PMHNP, stating he was sent by his wife. He explains he used to own a video rental store, and as a result, he has a large collection of VHS tapes. He continues to collect these "antiques" and does not see any problem with this because they are valuable. He admits he never watches them, because he can never decide which one to watch, and he doesn't have a lot of time. He has started running out of space to keep the tapes, and he admits many of them are probably ruined because they have been housed outside in a hot storage unit. Which diagnosis is most appropriate?