Ah, you misunderstand. No, I do intend to return to the States at the end of/during my 6 months. I have absolutely no intention or desire to do anything illegal or mislead any border patrol members. I'm just hoping to get back into Canada afterwards.
I looked into the DUI and it's not on my criminal record. I've been in and out of Canada multiple times with no problem now, and with them running a background check. I still plan on applying for Applied Rehabilitation next year just to be safe and make sure my name is clear.
Currently, I'd like to visit my girlfriend for 6 months. If allowed, I'll be able to leave and re-enter for another 6 months - by this time I may have enough points on my test from learning French to try for skilled worker, otherwise hoping for another visitor visa. We are planning on being married within the year. Once we're married, she's planning on applying to sponsor me for PR, assuming I don't make skilled. I understand now that I won't be able to work or look for work until I get PR, and my girlfriend is prepared to support me financially. Obviously, the distance is an issue, and we'd like to be together as much as possible throughout the process - but not illegally. I have no desire to instill any distrust in the country I wish to one day be a citizen of.
One thing I am curious about, should I call her a friend or my girlfriend? I hate the idea of lying to a border guard, but I don't want them to think I'll be outstaying my visa because we're together.