Reddit mentions of JEALOUSY SURVIVAL GUIDE: How to feel safe, happy, and secure in an open relationship

You might want to check out the following resources:

https://www.amazon.com/Jealousy-Workbook-Exercises-Insights-Relationships/dp/0937609633

https://www.amazon.com/JEALOUSY-SURVIVAL-GUIDE-secure-relationship-ebook/dp/B075ZN3YCC/ref=sr_1_1?s=books&ie=UTF8&qid=1519216854&sr=1-1&keywords=the+jealousy+survival+guide

https://www.amazon.com/Polyamory-Jealousy-More-Essentials-Guide-ebook/dp/B01E0L4DAM/ref=pd_sim_351_1?_encoding=UTF8&psc=1&refRID=J1F12H2VHG1SFKSCKVTS

Also, it's possible that in the long run you are just not suited to polyamory. I'd recommend giving it 6-12 months and working on it, but if you're still miserable in a year then I think you should cut your losses and find someone mono. I'd recommend this article: http://www.polyamorousmisanthrope.com/2008/01/07/you-dont-have-to-do-it/

I was just going to suggest her book. :)

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JEALOUSY SURVIVAL GUIDE: How to feel safe, happy, and secure in an open relationship. https://www.amazon.com/dp/B075ZN3YCC/ref=cm_sw_r_tw_dp_U_x_QdYUCbT6SY781

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I think the other posters are right that you're half way there. I think working on your own reactions, and figuring out what you need from her to feel more secure are things you should focus on.