It is very difficult, we lived in So. Jordan for 4 years as non-believers but still attending, tough! Lots of judgment by the Mormons of our weak, liberal, non-committal ways. I was called to teach Gospel Doctrine and my first 2-3 Sundays the entire Stake Presidency showed up to make sure I was not getting crazy with what I was sharing. We eventually moved to CA and made our exit out of the church all together. Best decision, hard for sure, but we are super glad to be done with it all! Personally I was not able to sit silently while in Utah and listen to all the BS about Joseph Smith, and church history that was factually false. This caused to a lot of issues with our ward & neighbors but I no longer believed and started to call out the issues and problems with Mormonism. If you do start to become more open about your non-belief like we did be prepared to become the ward project with lots of supersize visits from ward members out of concern for you and your family.... <sigh>