I declared an internal war that hasn't stopped yet. I don't know what to do. My…

I declared an internal war that hasn't stopped yet. I don't know what to do. My social relationships are falling apart. I used to be the most perfect girl: popular, funny, and full of positive qualities. I was myself. Now I just don't know what to do. I haven't been able to adapt. I'm just a silent, sometimes agitated person, angry about something I don't know what it is...