Too loud during sex

Katie
My roommate just texted me calling me and my boyfriend selfish and rude for being too loud during sex. We've lived together for almost three months and this is the first she's mentioned it. I have never been so upset over anything I am completely filled with guilt. I'm terrified of her now  and I've been crying for over an hour. My boyfriend says that it's not our fault but I feel like I should've known better.