Advice needed please help?

I have past trauma and struggle with trusting men, even though my current partner hasn’t done anything to hurt me. He is very understanding and does reassure me but I don’t know why Instagram in particular is the big charger for me because my ex-boyfriend you should subscribe to like naked girls on Instagram and that really messed me up because every time I used to go on Instagram I saw something very disturbing that just apart from all the things that he used to do this was one of the things and now instead of us become a really big trigger for me. How can I manage my insecurities with my current partner without harming my relationship? Any advice from other women about having you cop with your office his name after his been destroyed in the past and how do you trust again? I know a lot of us do with me working on myself which I have. The last relationship was very dramatic and abusive. It’s taking me some time to still heal from it.

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Advice needed please help?
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