Boggles the mind, doesn't it?
Other than Trista & Ryan, I don't think that there was anyone who really meant the engagement. Perhaps Mary & Byron.
Ian's and Andrew's amd Charlie's rings really were lets-live-together-for awhile-to-see-if-it-works. For awhile it did.
And then Jesse, Blob , Travis and J** just wanted out of the whole deal.
Lorz may fall somewhere around Andrew's, is my guess