Ignore her antics when you're riding, if you are outside the fence; she obviously feels good enough to be herd bound. If you can, perhaps try stalling and giving her some hay when you ride, then she is preoccupied and won't be able to 'see' what you're doing. You probably can't do much other than that to keep her from going goofy when she is loose in the pasture, and she wants her herd mates back.
It has nothing to do with jealousy, really...she is the dominant mare, so that is why she acts the way she does when others are 'put before her'...ignore it...have a crop or rope to use on her to make her back off, and don't let her in to your personal circle with the other horses until she is calm and relaxed about the situation.
I would say what this gal just needs to spend alot of time at a patience pole, so she can relearn that "she" doesn't govern every second you are out there. Don't put her up, or feed her until she is standing, calmly and attentively. You can start out with super short sessions, in that you tie her, and wait for her to be calm for just a second or two, untie, go for a short walk, and back to the tie. I prefer, however, to take them in, tie em up, and go about my business; cleaning stalls, preparing feed, etc...I don't yell at them or otherwise physically reprimand...I just ignore their antics and won't go to them until they are standing quietly. Then I calmly untie and take them to where their meal is, ride, or groom and do groundwork, etc. I like to do this several times in a day to reshape the impatient behavior.
"The ideal horseman has the courage of a lion, the patience of a saint, and the hands of a woman..."