Fighting parents

I'm currently living at home with both my parents. They have been married for over 30 years and very unhappy. They fight to the point that they separate or don't talk for weeks. Not only do they not talk but my mum puts the blame on my dad and I that "we did this". I'm struggling to deal with all these emotions. I know I don't have any input in this, but being told by your parent your the blame is hard to take in. Any suggestions on how to deal?