I had a dream about God?

What happened was that you got in tune with the universe in your dream. The message was not a message in words, but in feelings. That's why it is not bad that you "forgot what he said." You are certainly not losing your mind. On the contrary, you are discovering a good way to cope with the stress of growing up. When we breathe deeply, we calm down, center ourselves, and get back in tune with the universe. Then we are not fighting reality, but learning to accept it. That is what the Lord's Prayer means when it says "Thy will be done." And the fact that your best friend was there too is a reminder that we are all interconnected, and never really alone. A very good, and spiritual, dream!