About the jailbreak - where is Barty Crouch, Jr?
Is Harry even interested in any of these little girls? He's thirty, after all. He's been a soldier and a hero and an icon and "delusional and attention-seeking" and the list goes on and on. I'm not sure that a sheltered girl who is barely adolescent would be attractive in any way.
In fact, I wonder if he feels like a pervert?
Crouch Junior is about 8. Harry is not thinking of the girls sexually, but his body has 12 year old reactions and interests. He'll discuss it with Mrs. Potter over the summer.