Partner Has Moved Himself Into My Home [without Asking, Or Paying Any Bills]. Am I At Risk Of Him Having Rights To Anything If We Break Up?

Homeowner in my 30s. Dating this man for a year and a half.

A few months into the relationship he began moving things in, and dictating how things are (ie, how my pantry should be organized, bathmat needing to be hung up, the volume level that was acceptable to listen to podcasts while i'm cooking, reorganizing my cup cupboard to a different cabinet while I was on a work trip because he was "so helpful"). By last December it was like he lived here, had taken over my spare room as his office, etc. He has however never paid a bill here. Things got super interesting when I got laid off, and he continued to eat groceries, use utilities (he has never met a light switch or long hot shower he didn't like), etc but never once offered to help while I lived off my savings + unemployment (meawhile, he was making 120k with no debt), for three months. When I asked later after starting my new job if it had ever crossed his mind to ask about helping me, he stared at me and said "I figured your unemployment covered your mortgage, car payment and all your utilities".

Here we are, a year later. I am gainfully employed, but woefully unhappy with this relationship. Legal of reddit--If i break up with him, does he have any adverse possession rights or anything weird to try to weasel me out of my home? He's never paid a bill here, but he has done an occasional project--a small back patio, put in one electrical outlet, regrouted a shower, helped with landscaping one weekend. State is Ohio. Should I be seeing a family attorney or real estate to ensure I'm covered?

I can literally hear him running my microwave and shuffling back to "his office" to work remotely while a space heater runs full blast, as I type this.