When all you do is tell a kid to get over the fact that they got abused, it pushes them back.
It makes them feel stupid to have strong feelings about it and they seclude themselves,
They worsen,
They fester.
You don't keep telling them it gets better.
Sure, there are days you can and will have to, but there are also days when you have to just let them be and understand they're in pain. That even though you're cured, they're still in a rough patch. Try to remember what that felt like and keep your thoughts to yourself. Remember: telling anyone you'll be fine repeatedly pushes them back even though it will or could eventually be true.