I always thought something was wrong with me, that I was weird odd, not normal for having the very experiences that you are describing. I would judge myself so harshly and critically for it. I was so mean to myself. I would punish me for doing what came naturally. very insensitive, just like your roommate. after I learned these were just my defenses and perfectly normal for someone with ptsd I learned to look at these responses differently. when I had an over reaction to something and went to judge, I became more accepting and told myself "this is perfectly normal for me". so you can tell your roommate you are being human, a human with ptsd, a quite perfect human with ptsd and be proud of it. take care.