In case you missed it, Desiree got dumped by the man she said she loved and would pick at the end, and then did a complete turnaround (WITHIN DAYS) and got engaged to a different man in the finale after her first choice departed. Had I been her personal adviser, I would have told her to wait a few months for the ring instead of accepting a proposal immediately. This would avoid the look of desperation.
All I can say is that a ridiculous show will yield a ridiculous ending. Enjoy the clip below. Good luck you two crazy kids.