How does a tenant get an occupant to vacate the premises?

My boyfriend moved in with me several months ago, and recently we moved to a bigger house. On the new lease, I am the only lease holder (the only one that signed anyway), but I had him listed as an occupant so I would not get in trouble with having an unauthorized person living in my home. He has not worked for the better part of the year and has become verbally abusive. I have asked him to leave several times, but he refuses. What is the easiest/fastest way to get him to leave without displacing myself and children? Would a 3 day notice to vacate from me suffice since he is only an occupant and he has not contributed to rent or utilities?