Managing personal Outlook.com account settings, security, and privacy
So I agree - it sounds like he has been using your email address, but not by logging into your outlook.com/hotmail account. Instead, he has told people (and facebook, etc.) that his email address is yours instead of what is really his. Given that you have the same name, his proper email address is quite possibly very similar.
In this case, changing your password would have no effect as your account isn't compromised.
To be fair, I don't think there is anything Microsoft can do in this situation. If this other guy hasn't woken up to it by now, I have limited sympathy for him. Of course, Facebook and banks should validate email addresses before using them, but if you clicked on a link in such an email, they wouldn't know better.
Maybe the best approach is to set up rules to block emails from these specific people, or just simply delete them.
Sorry, I can't think of any other alternatives.