How do y'all deal with the loneliness of being an atheist in a religious family?

I became an atheist almost 8 years ago, but didn't come out to my family (or anyone else for that matter) until 4 years ago during a rather traumatic time in my life. My family is kind and loving, but very religious, and none of them has ever wanted to talk about my deconversion, and I don't know how to bring it up. I'm sure they think it has something to do with what was going on with me when they found out (it doesn't), and I don't want to ostracize them by talking about it, but it's a fundamental part of who I am now, so I often feel like a stranger when I'm around them.

Couple that with having been single for over 4 years now, I sometimes feel like I'm trapped in a box. And not a fun cardboard box with windows and whatnot, either; more like a corroded metal metal box that's just a few too inches short to stand up in.