Polyamory is different for everyone. To me, I'd just say you're in an open mono relationship. You say you've not yet had a relationship with anyone else, just dates and one nighters? Seems like you've been in it for the sex. [doesn't have to be a bad thing!] But you also say you've met this guy you could have more with. I think that could be polyamory, if you do end up loving him. I don't personally enjoy that the openess is gone when you guys are together again either. Poly isn't something you can just turn on and off.
I hope you have a good time in whatever it is you're wanting to do though and hope it's something that makes you happy. Because that is the most important thing. =] If you want to talk more personally at anytime, feel free to send a PM my way. Welcome to the site.
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