Why are people calling him a pedo just because seeing a child happy makes him happy? I mean I like cute babies, I like happy children. Doesn't make me a pedo. I also like seeing seniors holding hands, there's something really sweet about it.
Are you going to call those cat lovers out there, that find cats adorable and heal their tired hearts. Or dog lovers, that want to cuddle with their dogs. People into bestiality?
EDIT: In case people need more proof he's not into children like that. If you consider his age and he really was a pedo, he should be making Ritsu carry him around to get some skinship. Hell if 14 is too old, tell his dad he needs playmates that same age as him.