Thanks a lot for the advice
Welcome to our Forum. There is absolutely zero risk of HIV from the situation you describe. High risk behavior increases but does not guarantee that your housemate has HIV. In fact, it is probably unlikely that he does. Even in the unlikely situation that he does have HIV however, you are not at risk. HIV is spread through sexual contact and injection of infectious material into tissue, not by touching or through indirect means such as on a bar of soap.
There is absolutely no risk to you, no need for testing and certainly no need for PEP. EWH