My girlfriend just told me that she believes sex and love can be unrelated and she wants to be able to have sex with people she knows a la casual encounter. She says because she considers it fun.

I want a monogamous relationship, but I told her I would be willing to have extra partners brought in from time to time for her. But this wasn't good enough. I love her and I really want to stay together with her.

When she told me about this I became extremely jealous. I did some research online and found a site about this sort of thing and it said that my jealousy would be the main problem for this to work.

It said I should visualize the encounters she would be having with other people and identify the parts that make me jealous. I did that and I recognize that there are multiple parts of the act that make me jealous.

We love each other, and I don't want this to break us apart, is their any advice you guys could provide?