I need some honest advice.

Sooo, I just turned 25 and me and my bf will be together for a year in July. And we are talking about buying a house together soon. I am a Preachers Daughter and I also know about “Shacking”. My parents LOVE my boyfriend and they have a great relationship with him. My parents aren’t really feeling the shacking up thing because they believe it’s “out of the will of God” and they want us to be married first. I understand all that. I currently live with them as well. Me and my mom have a decent relationship. We bump heads alllllll the time and I can’t live her any longer. I want to live for me and not worry about what they think. I love them so much and I’m afraid that they will “disown” me or not really care for my bf because I decided to buy a house with him. I just can’t live here because I don’t get treated as an adult! I just really need some thoughts of what you guys think. Anything would be helpful.