I have a bit of difficulty with my parents. I need some help, advise, or even just someone who gets it.?

So basically my parents are going through a divorce. I am currently 17 years old and have been in the middle of this since october. Dad told me before he told mom that he was leaving. I have been falling into more depression over this than I really should be. They dont fight much, but I can tell they really resent one another. I have tried talking to both sides but I have zero room for negotiations with Dad as he says I'm leaving soon, but it's my family and I want a say. I have tried talking to my mother about this but she basically avoids the subject at all costs. I have just been getting more and more stressed over this and have recently stopped eating really and have not been paying attention in school, which is odd as I am usually a solid 3.5 gpa student. I also have been thinking more and more about my childhood, and I have been told on a daily basis I look really depressed. I also have slipped back into old habits that I broke years ago, I am just trying to figure out whats going on. I need some advise on what to do. I want to get some stories from people who went through my situation or are going through it. More or less I just want someone who really gets it to talk to.