I'm sorry to hear that you're going through this. Like someone mentioned previously: your dad has to find a way to grow up and act more mature for his age. If he has blamed you for anything in the past it's not because of you. It definitely does sound like he's trying to control your emotions by putting all the blame on you and none on himself.

I hope things get better for you. I'm sorry that I can't think of any solutions, but I read your post and did care about the words you said. I wish you the best in whatever happens in the future.