Welcome back, michigas73.
I thought you'd have the official web site URL burned into your brain, but here it is
Welcome Page | Page d'accueil
You'll just love pouring over the endless pages of legalese.
Information about practicing law in BC can be found here:
The Law Society of BC
I believe CIC recognizes relationships over a certain period of time as being equal to marriage for immigration purposes, but one would have to prove that you, as a couple, had met all the requirements to fulfill a common-law relationship. If I recall correctly, one of the standards is cohabiting for a 1-year period which might be difficult for you to do.
There are 2 avenues for spousal sponsorship: from outside Canada and from within Canada.
CIC makes it pretty clear that if a Permanent Resident applicant leaves Canada before their application is approved, there is no guarantee they will be allowed to re-enter the country. Of course, no one except a Canadian citizen or PR is guaranteed entry, so this doesn't mean you'll be barred from entering, just that you have no absolute right of re-entry.
You could marry, apply from outside Canada, continue to work in WA until such time as your PR application is approved, and then "land" and be able to work immediately. You could still make your visits to see your poopsie-pie.
OR
You marry, apply from within Canada, not be able to work immediately in Canada, and take your chances crossing the border.
If either of you have been divorced outside of BC, please check to see if your out-of-province divorce will be acceptable-- you may have to provide special assurance in the form of legal opinion on the validity of the divorce before being granted a marriage license.
Either way you go, it's the typical government cluster-bunch of forms, fees, and hurry up and wait.
Have fun.