There were rumors of Jen dating a teacher, and Lorenzo schmoozing socialites at benefits after the show aired. I always thought that it was Jen who called it quits and just went back to her "old" real life. Lorenzo did the same. He gave a wonderful talk about his experience at Rollins, and that was about the end.
His family played the show for all they could get in advertising Good for them - everyone should get some benefit from doing this show, and that is one thing that the producers use to draw in the "stars." Who knows if he had any other motivations other than publicity and attention.
I liked Lorenzo, but he wasn't a very charismatic bachelor and wasn't particularly "smooth" with women. He certainly had some interesting cast members on the show however. I would like to know what many of them are doing now.