[That...gets an awkward silence from him for a couple of seconds. Why does he want to help this girl so much? Well, he can think of one reason, but that's very personal so it's not coming out today.

So! He'll go with the a more reasonable answer, still honest answer.]

Because I think you deserve some help with this. You clearly didn't come from the best situation before this. You shouldn't be alone in a situation like this.