A: What you do is exactly what you want to do: Stop being the mediator, translator and soft shoulder for both of them. There is no way you can participate in the argument between your parents without hurting your relationship with both of them. Leave it to them and their lawyers to work it out.
Do not fall into conversations with either parent about what’s right, just or fair. Do not let either of them tell you secrets and swear you to secrecy. It’s inappropriate for them to do so. It’s equally inappropriate for you to even pretend to listen. Simply remind each of your parents that you love them both and that this is their problem to figure out, not yours. People can be wonderful parents even though they were terrible partners. You have a right to have a loving relationship with each of your folks, even if they can’t even talk to each other.
I do suggest you contact the behavioral health services at your college and make an appointment with a counselor — not because I think you are ill but because I think the situation is understandably distressing. You need to be able to vent to someone without worrying about tales being carried to either parent.
I wish you well.