Out of line mum? Hi

I’m almost 18 and very keen to move away. I met this guy when we were on holiday and he had been to where I wanted to go so I was very fond talking to him. As I was leaving I wanted to see him one last time

Again so I did. The problem is I left when everyone was out so when they came back they freaked. I didn’t hear my phone but it had a million unread texts oops. Mum went to reception and saw footage of me meeting a boy on elevator and going to his level together. I was in so much trouble because I told them I didn’t bring my phone and was looking for them (obviously they knew that was a lie). I was in bed trying to forget the night and Mum made a comment ‘who knows where her vaginas been after tonight’. that comment mostly Completely pushed me away and can’t wait to leave. She expects me to tell her where I went even though my messages where opened that I hadn’t opened Lol(how mysterious as according to her she didn’t know my password ) and keeps saying how can she trust me when I’ve been so irresponsible and ‘what is one responsible thing u have done lately so I can trust u’ just a rant but if u have advice feel free. She made lots of bloody rude comments but it seems she can’t recall them wow!

im in trouble for ignoring what happened and not talking but No matter what I did with him I don’t wanna talk about it with her now at all . Plus she seems like she already knows things and wants me to admit them, only makes me feels ashamed and trapped.

How do address it with her?