I feel like a dead man
Is there a reason you feel like a dead man?
Because I've just lost an important person in my life who was very emotionally attached to me.
It's understandable that you would feel scared if you just lost someone important to you. If you are having a rough time of it you might want to seek help if you think that it's needed.
I don't know where to go.
Try to talk to a trusted friend or family member. Anyone you trust. The important thing here is that you're talking to someone.