Train, I have those same feelings when I look back at pictures or mementos from trips, vacations, school functions. Times when I thought we had so much fun together and we seemed so happy. Were they really conflicted inside and just putting on a show?
I know this is going to come across as a little leaguer giving a professional tips since you're a lot further along than I am, but the one word that I kept thinking of the whole time I read that post was- TIME.
I can only imagine that over time, those feelings you described will eventually be replaced with comfort and security.