I don’t do this anymore but I used to as a child age 3-12. I come from an abusive household, not sure if that has something to do with it. 

Whenever I was living in a happy moment I would “freeze” it in my mind and save it so that I’d remember it forever. I’d do this by focusing on every detail of the scene I want to freeze and envisioning it like a picture in my head. I intended to capture the whole moment but as an adult I don’t remember much of the context but I do remember the visuals involved. Just curious if this is a BPD thing and if any of u guys can relate :)