When I was there before I crossed the border every three months and I heard latley that when border patrol notices this trend they are starting to deny re-entrance.
Now that Poland is in the Schengen zone there is no border between Poland and the other member countries, so it is more difficult to prove that you have actually left the country every 90 days, but on the other hand this reduces the chances of you running into trouble. I have heard stories that it is getting tougher for Americans who have been living under the radar in Central Europe for years in places like Prague and Budapest
I'm not aware of any employers employing americans
There are endless threads on this forum about teaching English. If you are a native speaker you will find work and an employer to sponsor you. Maybe for crap pay and conditions, but if you really want to be in Poland you can make it work. Once you have a work permit you can start to look around for better work. It is out there.
I either need to marry or have an employer help with a work permit
If you any parents, grandparents or even great grandparents from Europe you may be eligible for an EU passport. Each country has their own rules, but Poland and Ireland, to name two, are pretty relaxed about it.