You Can't Use Her Vulnerabilities Against You

If she says something and opens up to you based on insecurity, she's being vulnerable. You can't give her the space to open up emotionally and then stab her in the back with it a week later. She will no longer feel emotionally safe with you. So go out of your way to tell her things like, hey, you just shared a lot with me there and I respect you opening up to me and I promise I'll keep this safe. Even just saying something like that is like reaffirming to her that, hey, by the way, everything you just said is safe with me. And let's go to mental safety: verbal acknowledgement, verbal recognition works well too.