This never ever gets done if you do not react.
I am a big dude and everyone are afraid of me in real life. The funny thing is I can see it in their faces, body language, choosing of words. (but I am a normal good guy, never bully anybody)
So, with this fear attitude, you are not able to face and solve the problem. That guy, no matter of his character must appreciate you more once you express yourself.
He also have no idea what is happening with you. So, I would do like this:
Hey buddy, I have a very hard time sleeping due (your reason) and I would really appreciate if you could assist me here.
Google and buy x4 of something that could eventually improve the bed shaking, something between floor and bed legs. Say: I went ahead and bought this, try it, it might help.
So, you are the winner of this scenario, no matter about your opponent. Just do this and do not be scared of anybody.
Fear is only used for manipulation. Even if you have it with you, still act opposite and always alert others about your feelings. They hardly care about their own, that's why you have to express yourself, else you are invisible.