Originally Posted by Beck31
But do other people out there ever feel jealous?
Fixed that for you.
Jealousy is no more or less than a human emotion. Orientation, etc has no impact on one's ability to control one's feelings about a given situation. The only thing one can control, is what one DOES with said feelings.
Look, you obviously want a monogamous relationship (although to be honest I've never been sure if this is an online or offline relationship you're talking about).
According to your own admissions, the person in question is a FORMER owner. Thus, you are no longer "her pup". Thus [to be blunt] your jealousy is confusing.