If it were my dream, I'd watch the progression; at first there are just coffins under the bed with bodies in them. Some emotional or libido (since it's under a bed) parts of me are dead and I am content to "discard" them, I know they are there, they do not surprise me. It is interesting that there are two parts and one gets discarded but then one is getting out of control, is threatening to spill out so you get a friend to help you repair the container but the friend is disappointed that you are trying to do this, to keep containing so you can discard.

When the friend leaves, your attitude changes. You put your head (thinking, not feeling yet) on the container to "protect" it, it has changed from being threatening to being threatened by you. The object inside changes from an anonymous "body" to an actual girl, someone like you. You are becoming more emotionally connected to your "insides", your self.

Do you have a therapist? If it were my dream, I would imagine the "friend" was my therapist and whatever we were recently working on is being played out in my dreams. I would see it as a helpful dream, telling me I am getting "better" and coming alive instead of just being a "shell" (dead self/coffin).