Sorry to hear about the issues you're having. I'd certainly agree that the situation isn't doing you any favors in your work on jealousy or being comfy with poly life. It's probably a good idea for you two to kick back for a bit and see if you can can work together on things, starting with the most important. Trust and communication are essential keys to working through jealously, at least that is how I see it. So, that would be where I'd suggest you two start. In the longer term, you're going to have to rely on that trust, so make it nice and strong before entering the poly world again. From there, start again with baby steps, ones which can help you with the jealousy and maintain the trust. When you have that pretty well handled, you may find that you no longer need the boundaries you once did.