Jealousy: Fearing the loss of something you have
Envy: Wanting what someone else has
Compersion: Feeling joy when someone you love enjoys what they have
Now that we have the definitions, I can get to the point.
When Danny and I got together, I had a lot of jealousy. He started another relationship not long after we started seeing each other, and there were a whole lot of emotions that almost derailed us entirely. Luckily, we worked through it, but it was rough.
I still have strong emotions about many of his other play partners, but now jealousy is never really one of them. I am not worried that someone is going to take him away from me. Instead, I am envious as hell. I am envious because I also want play partners, but I don’t put myself out there the way that he does. I don’t go for it and risk rejection the way that he does. I envy his ability to be so open to the possibilities of the universe.
I also envy some of the things he does with these play partners because I want those same things. He can top someone in a way that doesn’t work for us, for example, because going too far into that head space fucks with our egalitarian household. I envy some of the sexual adventures he goes on with a new partner because they are things we don't often do at home. There are some positions he doesn't favor, but that new energy makes shiny, and some things he just feels more comfortable doing with others.
Don't get me wrong, we have a satisfying, and hot, sex life, and I know he has passion for me--but I am comfortable and known, and NRE is a hell of a drug.
Compersion definitely co-exists with the envy and I want him to have these experiences. I want him to have NRE and to feel extreme passion for someone, and I want him to try new sexual positions and explore various aspects of BDSM. I understand that I benefit from his adventures both because he is happier and because he learns cool things (in fact, I never did say thank you to the girl who helped him develop that fabulous oral technique!).
But, sometimes it hurts, and sometimes emotions just aren't that clear cut. I want him to have everything--I guess I just want to have it too.