I’m not a virgin Mom.

Hello, I’m 19 years old. I live with my boyfriend. My Mom made me get a 2 bedroom apartment so he has his room and I have mine. My mom TO THIS DAY swears that I am virgin and that I sleep in my own bed and I keep lying to her that I still am because I’m so afraid that if I tell her that I’ve had sex with my boyfriend that it will break her.. (she’s cried and called herself a horrible mother because Ive admitted to drinking alcohol on the weekends and I can only imagine her reaction to this) how do I tell my mom that I am not virgin..................