Cherry is hurt about someone you USED to love? I don't think this bodes well for eventual acceptance on her part of your interest in polyamory. If she can't handle past relationships without getting bent out of shape....how would she ever handle a current relationship with someone else??
I wouldn't want to face this issue (jealousy or hurt over a past love) going into a MONO relationship much less a poly relationship!!
I don't know how you express yourself in-person, Somegeezer, but I think you communicate quite well in this forum. Just remember to take good care of yourself and YOUR needs, too!