Girls, I need some advice about my roommate.

 I had forgotten my phone at home this morning and when I got home I came home to my phone ontop of a long letter on my bed from my roommate who had in short gone though my phone and saw that I had something about her acting weird to my other roommate, nothing bad just asking if she knew if something was going on becaus she was acting weird towards me. She went on to say she has lost all respect for me and that I am a terrible person and she never want to talk to me again. Which I would be ok with but we live with 2 other girls in addition to her and I don't want it to be awkward for them.