Can jealousy be gone forever?

Please forgive me, I asked something about jealousy before, but this is not the same but similar. If you have struggled with being jealous before of your partner, but you promised to deal with it, take the blame for it, can it still return? My ex had his cycles of jealousy that always returned and I couldn't figure it out. I never flirted with anyone, never cheated, did not do anything wrong to spark his jealousy. He could never claim I had done him wrong. When we did part ways the jealousy was not known to others to blame or be part of the reason we broke up, but I realized how bad it has been and how it effected me. The break up turned out to be more difficult than I had at first imagined, but I guess that's another story but I know the impact it had as well. I promised myself I would end a relationship if I would exoerience the same thing again. Once I felt safe and secured in my relationship with my partner I mentioned I had been in a previous relationship where his jealousy was a reason I was unhappy. What some do not seem to get is that because of all the jealous games, controlling you who are subjected to it do anything but glow and get a good self confidence out of it. Instead you become insecure, you try to predict anything that can set it off, you are way less spontanous, open. My fear was that my partner (now ex) could hurt another guy and just in general show off as bad attitude. When my current partner got jealous he too got a pretty bad attitude towards others. I could tell something was up and by his lack of manners I felt embarrassed he was like that. Today he seems clear of it, but I still keep things to myself, afraid. Things I would like to tell him, share stories of what my day has been like, only I don't dare to mention anything if it involves another guy,. Should I or does noboby do this because you do not want to give your partner the wrong idea? I have only bern with ex that were jealous, so I don't know what's normal or not.

Updates
8 mo
Update. The jealousy part is difficult to adress with him. Always he wants that conversation done with as soon as possible for reasons that he says he don't want to be in the same box as my ex, knowing how his jealousy effected me back then, me having told him, something I thought would be something I never had to go through again. I have become more educated in all the ways jealousy shows it face and recognize more than before. Been verified that how it makes me feel is only natural.
Can jealousy be gone forever?
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