<human>: Give me the gist of the text in a nutshell

So I met my girlfriend about a year ago, and things are going great. I have been in a half-dozen relationships in the past, and I can already tell that this one has something that all the others didn't. 

We're both responsible, post-college (22 years old), with jobs in the city. We decided to start looking at places together, but I haven't told my parents yet. My dad's a cool guy, but is extremely right-wing Catholic whatever, so it's difficult to think of ways to tell him. And I know my mom is gonna bitch at me forever about it, even though she's made some pretty bold decisions of her own at my age. This move will definitely be frowned upon in my family's eyes, and my reputation with them may be soiled forever.

Reddit, please help. For those of you that have been faced with this before, as I am assuming there may be a few of you, give me some tips. My biggest fear is losing connection with my family, as I love them too.
<bot>: my parents are super religious, trying to move in with my girlfriend, what's the best way to tell them without alienating myself from them?