Hello goldie33,
You do sound poly. My only question is, would you be okay with it if your current boyfriend was also poly? If he dated another woman, would you get jealous? It sounds like you would. There is such a thing as mono/poly relationships and they have been known to work, but your current boyfriend would have to consent to that. As for the other guy you've developed feelings for, he is a non-starter because you would have to break up with your current boyfriend in order to date that other guy. He has made it clear that he is not interested in any poly relationship whatsoever. You can still have feelings for him of course.
It sounds like you want a situation where you are poly but your partners are mono. I don't think you can get that with your current setup, but that doesn't mean you aren't poly. Perhaps we could say you are mono/poly.
Just some thoughts,
Kevin T.