This is also perhaps a too-personal anecdote but for those of us who DO love someone who has suffered trauma in the past, they're VERY VERY hard to convince you love them. You have to more or less reinforce it EVERY DAY because they read your every action with a lot more hidden meaning than you might think.
So it makes perfect sense Ciri is reading every one of Geralt's actions to be EPIC AND PORTENTOUS.
Been there, have the t-shirt. No fun at all. (In my case, the scar on her neck from the knife wound had healed to near-invisibility, but the wounds to her mind had not.)
This makes the situation in the game story even more tragic: Geralt is not exactly the world's expert on attending to the emotional needs of trauma victims, and if the developers are effective this carries over to how the player behaves as well. The result is many players experiencing the dead Ciri ending, wondering what the heck went wrong, and then being quite irritated when they learn which "minor" choices led to this result.
As for Ciri being desperate for affection, there's something about how she looks and acts that strongly emotes "Please love me!" Maybe it's the excessive eyeshadow or the wounded deer look when she is sad. I've known many of these sorts of people in real life, they strongly attract two types of people: good people who instinctively try to nurture and care for them (Skjall, Geralt, Yennefer, the other heroes) and manipulators who try to use them (Avallach, Emhyr, Eredin, etc.) What is most infuriating is that these sorts of people seem magnetically drawn to the manipulative types, and the reason is repetition compulsion.
Side note: The player is told that the Baron is salvageable, despite his many very serious problems, because he is good to Ciri and doesn't try to exploit her. This is why many players care about what happens to the Baron and his family and try to help him get on the road to recovery.