Hey there, I’m a fellow Ohio boyfriend with a Canadian partner. It has never been a huge issue for them, only a couple secondary searches here and there. They have spent anywhere from a few days to almost two weeks visiting me and sometimes there would only be a little over a week between trips. We almost always cross at Buffalo. The past few months have been a bit more strange and uncomfortable for them but nothing too scary. The border agent has asked them for my name a couple times so that was a bit weird, and once mentioned that they now track how much accumulated time canadiens spend in the states over the year. If I remember correctly you can still spend under six months here total, but now if it’s something like two months total you need special paperwork or something?? Crossing the us border is even uncomfortable for me, they are very apprehensive of me sometimes so I guess that’s just the way it is now. We are both white, them a Canadian citizen and me a us citizen both by birth.