Is it normal to bad mad at my friend for something she hid from me?
WARNING LONG STORY: My best friend broke up with her very first boyfriend in February and after said she didn't like the experience and would wait until college to have a real relationship like she attemped before. She has continued to say that often whenever the subject came up but a week ago I found out she was talking to a guy. She never made a big deal about it. When I asked her about their relationship she said they were only friends and said again she didn't want a relationship. I accepted it and moved on until I got home from practice on Tuesday. She wrote me on facebook her plans for my birthday the next day and I decided to go on her profile. She wrote a status talking about her being really happy and something big had happened. I read the comments underneath and suspected something was up but pushed it to the side. The next day I came to my third period class and 2 girls that wrote on her status the night before, and are not very close to her, were talking about how they got my best friend and that guy together. From my understanding it had been going on for a while. During this entire conversation they were not even talking to me but to another girl in the class. I couldnt even find out from my best friend but by eavesdropping on a conversation. When I confronted her she told me that she didn't think the guy wanted her to tell. (I knew she knew he didn't care if those other girls knew before me and were spreading it around school.) Needless to say I had a sucky birthday. One of the main reasons why I am mad though is not because of the situation at all. I am her best friend and we tell everything to each other, but during her first realtionship she kept secrets from me. I am scared she's starting to drift away again. So is it normal for me to be mad at her? Am i overreacting? Where should I go from here?