Talk about your feelings. It will make you feel better. If there are things you need, ask. Your parents may be so upset or distracted that they forget your needs. It's OK to remind them that you have needs and to say what they are. For example, you could say:
If there are things you need to know, ask. You should have as much information as possible about what is happening. If you are concerned about something, speak up. For example, if you feel caught in the middle of your parents' problems, say so.
Separation and divorce are very common these days. That means that many people have been through it themselves, and most probably know someone who has.
Good friends will be glad you've told them. They'll know that you're still you, even though your family is changing.