Hey I know it's hard, I really understand my parents are in the middle of their divorce and they have been married for 20 years it suck!!! It also feels like I'm the only child because my sister moved out a year ago cuz of my mom. Sadly U cannot do anything to keep them together, just let it flow. My mom isn't a good person cuz she cheats, lies, and just does so much more things that broke up my entire family. My sister moved out because of her. This does sound odd but I decided to live with my mom because it would be harder for my dad to care for me and I love him soooo much compare to my mom, but I might move out soon and I'm 13 years old. If you can't decide who to live wit just think of who u get along wit better, who can support u better, and which parent would u make it easy to be wit. Just to give u a hint, if your parents argue a lot over the 17 years about little things, they are most likely to stay together. If they kept it all in then they are most likely to split ( I know it's weird).