Woah! You sound like me! Your going to drive your girlfriend away. I almost drove my boyfriend away by doing these sorts of things. I have worked on this a lot in therapy. I really have no reason to mistrust my boyfriend other than he has a lot of female friends. I don't even think he is cheating, I assume that he's talking to these old friends who will convince him that I'm not good enough for him or he will find some girl whose trying to steal him from me. Or I assume he had a relationship with them that was more than just friends and they are trying to get him back. When I get these thoughts (it's usually if he's away or acting weird)I start checking his emails and phone records. My therapist describes it as my way for trying to "validate" my negative thoughts and reactions. So you'll pick out every last detail and turn it around to fit your assumed thoughts. Last month, he was as interested in sex. So I began thinking that something must be going on.I went and logged on to his facebook, email, and verizon bill. I saw that he was on the phone with a strange number for 64 minutes and he NEVER talks on the phone that long. I tied it to a time that was right after I left to take my kids to swim class so he knew I would be gone for at least 2 hours. I immediately freaked out! Do you see a similar pattern between the two of us here? You ultimately will lose her, if you don't work on this. Your stressing yourself and her. I did these things to my bf so often, he was ready to leave. I asked him to change all his passwords to everything so I can't get into them. He has gone to therapy with me a few times and I feel our relationship is getting stronger. We talk a lot more about my negative feelings and I feel now that I can go to him when I am having these feelings. He has since put a lot more effort into making me feel secure and loved. Please take these words of advice and think about them. Everytime I have freaking out over his supposed mis-deeds, they always turned out to be over nothing. I know I am female but you may need more reassurance from your girlfriend about your relationship and that is ultimately what your seeking with this behavior.