We can’t control as much as we’d like, no matter the situation or matter. Your past… is the past and you should leave it there. Or in my opinion you’re going to destroy every potentially healthy relationship-repeatedly telling your current partner what “injustices” have been done to you and how you’ll never be the fool to allow it to happen again. 

There are health ways to trust with the absence of naivety- try being kind and assertive v. Catty and aggressive over your misfortunes in romance. 

Anticipating wrong doing is typically the reason wrong is done.