Yes, I suppose you are right. It wouldn't be dishonest to open the relationship up really, from my standpoint, but he would probably interpret it that way in the long run.
I guess I just wish it was possible for a relationship to fade away gradually like a regular friendship without having to "break up"...because really that is what I would hope for. But obviously even -- well, ESPECIALLY -- open relationships require work and talk and hurt feelings when new people come into play...so I guess there's no way an open relationship would protect him from the hurt feelings.
Thanks for replying....I guess I knew the answer though.