It's part of their past, their past is part of who they are. I might ask what was she like, did you love her, that kind of thing but only out of curiousity. We all have a past and not all of it is bad. Plus, I only ever get jealous when my instincts tell me I'm being threatened, the past is not a threat.
RE: Do you like when it's snowing
I like building snowmen :D