Eugene just lost Rosita; I'd say he's a bit emotional right now, especialy after his outburst at Rick's meeting. How is it we know he is no simply conjuring this elaborate safe haven with his mind similar to what occured with Rick following Lori's death? Additionaly I find it odd that she told Eugene she only wanted to talk to him. It may seem too elaborate for this but keep in mind Eugene is a liar. He said that that was one of the only things he was good at; maybe even good enough to fool himself.