As I sit in church, more and more I feel the rituals have little meaning to me. It is up to me to find the spiritually uplifting portions. I am confident I have not lost my faith. In fact, I feel like I've never had a more vigorous faith than I do now.
As I've mentioned before though, one does not need to join anything with Buddhism, you just start practicing. Each moment is an opportunity to be more present, to have more loving kindness, to be aware of the needs of the world.
So as I participate in the Christian church, I often think what is the best way. This is my Dharma group. these are the people that I am to be present to and hope to relieve their suffering. I don't need to go anywhere or be someone different. These people have been given to me and many of them look to me as an example of how to live so if I can help them on their path, that will be enough.