27, moving out before marriage.

So background story: I am 27 years old and pay for everything on my own… except rent. My parents are very old fashioned… women should not have intercourse before marriage, and should not move out until married. That is their way of thinking. So, I’ve lived with them all my life except one year when I was 23 I moved to a different city for a job. I was single and lived there alone in my condo. My parents were completely fine with this. It’s only when I am in a relationship that they become super helicopter parents and very restricting. ie. not allowed to sleepover with bf or go on trips etc. So anyways after a year of living on my own I found a job near my parents future retirement home in a different city. They offered to let me stay there and when I told them I didn’t want to because I still wanted to live on my own they pretty much guilted me by saying I’m not appreciative and being stupid for not taking the opportunity to save money and not worry about paying rent. So, I have always been a people pleaser and wanted to be the child my parents were proud of so I just decided to stay to not cause drama… well I was single the next 3 years so there wasn’t much issue until now when I started dating a guy they like very much. I am 27 and he just bought a house for us. Now that I am dating, even though they like the guy, I am more under surveillance. They do not let me stay at his house and call it “ignorant and bad for my reputation”. They do let us go out etc but we come home to them from dates so we get no privacy, as we are not allowed in the bedrooms. If I stay out late my parents “can’t sleep until I get back” and then get mad that I was inconsiderate for being out late because they weren’t able to sleep until I got back… keep in mind I am 27, make good money, have my own car, and have never been in trouble with law or anything. I finally decided the feeling of feeling like a child in my relationship was too much for me and so I told my mom I was moving out. She blew up.. she cried, yelled, said I was ruining her life, that I was killing her, that I am betraying her, that she is distraught, etc etc of course this makes me feel guilty and horrible because I love my parents, but this is exactly what has kept me from moving out because I wanted to avoid the drama. But this time I decided to rip the bandaid and I have moved out and in with boyfriend. I am just having a hard time not feeling horrible for how she is feeling and for her being hurt, even though I know in the grand scheme of things I am doing nothing wrong. She just doesn’t believe in moving out before marriage and for some reason only had a major problem with it now, when I’m in a relationship, even though they like the guy. Also, she is not just upset because I am moving in with my boyfriend, because when I first brought this up I said I was moving out into my own place not with him. And she still blew up and had all those reactions to it. Please just tell me what you think or how I can move past this overwhelming guilt and feeling horrible for making my parents feel this way.