Yes he is really getting married to Jenna Rice, that's why he isn't going on the Rim Tour or whatever Paramore is going on, Taylor York's brother will be covering for him plus Josh Farro wrote a blog saying he is engaged. Hope that helped.
Yes. It was announced in a Paramore.net post on December 18, 2010 that brothers Zac and Josh Farro were leaving Paramore. 3 days later, Josh Farro posted a very lengthy post on his own blog explaining his reasons for leaving.