So did you go right from an LDR to moving in with the person? That can be a massive shock, as I'm sure you realise now - so much stuff you can't know about a person when they are LDR and once you are moved in with them, it becomes very difficult to go slowly.
And now you find yourself living with someone else that you don't want in a relationship...
I think there may be a pattern there that you may want to examine.
Some poly folk will get involved with you under circumstances similar to yours, but I think that a lot will tell you to go get your life sorted out a bit more, then contact them, because they probably don't want to have to deal with the potential drama that a setup like yours could cause.
Please check out The Birdcage - an open, friendly Polyamory forum for all parts of New York State
"Listen, or your tongue will make you deaf." - Native American Proverb