1. absorbed in thought; meditative
2. contemplation; reflection.
I was trying to find a word that meant something not like bitterness, but looking at or thinking fondly or meditatively on things of the past. Not remorse; just thinking. Kind of in retrospect; Pensive: (deeply, often wistfully or dreamily thoughtful; suggestive or expressive of melancholy thoughtfulness.) I can't find this word I'm looking for..maybe it doesn't exist.