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I'm sorry to hear about your situation. There are a couple of things that you can do. If you want to move out and find another place to live, you can break the lease because he's already breached the "warranty of quiet enjoyment", which means as a landlord he has to leave you alone and only enter the leased premises upon reasonable notice and for reasonable reasons (repair, inspection, etc...)
Now I understand that you may wish to stay in these premises, and in that situation you can seek an "injunction" against him coming on the property and violating your privacy. This would need to be done through the courts. You can find the forms and instructions at the following link: http://courts.mi.gov/Administration/SCAO/Forms/Pages/Personal-Protection.aspx
Finally, if you so desire, you can get an attorney to file for the injunction. That being said, you need to contact an attorney in your area that deals with landlord / tenant cases. Go to www.lawyers.com or www.legalmatch.com to find an attorney in your area. You should be able to find one that will give you a free initial consultation and better advise you of your rights, any problems with your case, likelihood of success, how courts are treating cases such as yours in your area, and what you should do next.
Hope that clears things up a bit. If you have any other questions, please let me know. If not, and you have not yet, please rate my answer AND press the "submit" button, if applicable. Please note that I don't get any credit for the time and effort that I spent on this answer unless and until you rate it positively (3 or more stars). Thank you, ***** ***** luck to you!n