woundedhearts,

You sound like you have a heart of gold. You don't need the pressure of worrying about your room-mate.
Can you move? Or get your room-mate to move?

As for the pressure cooker thing. Remember that a pressure cooker has a VALVE on it, so you can let the steam out- when you feel safe enough to do so.

If you bottle up that steam and never let it out, its more likely to explode. It's ok to let the steam out- safely!

Big hug to you. Take care.