This actually puts things in perspective. Maybe we will see how much does he knows about the other girls bullying Hina.
At first I thought he knew the extent of it and was trying to not get involved or something but now with this chapter I think perhaps the reason he was trying to look away and distance himself as much as he could from her wasn't because of the bullying, but because he actually knew that if he got close and found all about hina's problems he would use that all as an excuse to change with her and use her, until at some point he may not even desire to change back with her.