Roommate problems

I have been having problems with my roommates Nate and Jenna since we all moved in together over the summer. We were all friends before but now it seems like they have been ganging up on me. I wanted to find out what was going on since no one seems to want to tell me, so I logged on to Nate's computer (i know that was wrong) to see what he talks to Jenna about over facebook. I found the most AWFUL things...they both said that if I died people would only be upset for a day and then no one would care and everyone would just forget. I wouldn't say that about my worst enemy! Jenna said that I am a horrible person and only do things for other people if I will get something out of it. I do not think that is true at all because I am constantly doing things for people -especially her! I go out of my way for her all the time and always do nice, thoughtful things for her. I was so upset and hurt when I saw that. I have always thought of myself as a good person and have always liked myself, I think that's really important because if you don't like yourself how can you live with yourself? They are making me start to hate myself! I scrolled back to a conversation from a few months ago where Nate asked Jenna "how come it is ok for you and I to just be friends but it's not ok for me and her to just be friends? i mean she's a friend that I wouldn't mind hooking up with but still" and she responded saying that I act like I want to hook up with him all the time but I don't and he shouldn't be doing anything for me at all even little things just to help me out because I am such a horrible person. As soon as she said that he changed his opinion and was like oh I see and then started hating me. I feel like she is the one doing this to me and I am not sure why! She did this with our other friend Alex. He started hating me out of nowhere too! All my friends say she's jealous of me and I guess I could see that, but I hate to think that my best friend would betray me like this just because she is jealous. I don't know what to do, I obviously can't confront them about it and I can't keep kissing their asses, it feels so degrading.