Fear mongering? Lawyer scared the life out of me

My (Canadian citizen) and my fiancé (US citizen) spoke to an immigration gestion lawyer yesterday. I am currently in the US visiting on a B2 visa. I have never had any issues crossing the border. Occasionally they ask me a few more questions, but never anything serious and it’s always « enjoy your trip! » at the end. I usually come for about a month at a time as my job allows me to do so, and my fiancé is financially well off. I’ve done this for over a year with no issues. Occasionally my fiancé comes to visit me and will stay for a few weeks at a time.

I am currently in the US visiting. We spoke to a lawyer yesterday who essentially said we are playing with fire, it’s a matter of time before I’m banned from the US, and that i need to stay in the US and get married. I don’t know if I want to do that, but I don’t want to risk never being able to see my fiancé again. I know no one can answer this question but is being banned from entering the US something I should seriously be concerned about?