Miley Cyrus, 19, and Liam Hemsworth, 22, are newly engaged, but those close to the couple suspect the wedding will never happen. OK! GALLERY: MILEY CYRUS FLASHES HER ENGAGEMENT RING AT LAX "They love each other, but their relationship is a total roller coaster," one source says. "None of their friends are expecting them to actually make it down the aisle." One problem? Jealousy. "Miley's super-possessive of Liam and has a really hard time with his ... Read More >>