try asking someone who knows him well.
Shinku Tora wrote:
Because men are told by everyone that they are lucky to have anyone at all.
^
if your BIL is anything like me, or most aspies, finding any person to have a relationship with is difficult and they tend to stick with the people they already know, rather than pull off the next-to-impossible feat of meeting new people - and risk getting into something even worse.
so we stick to the devils we know. it's familiar.
maybe she's good in the sack. maybe she does good things for him occasionally, intermittently reinforcing, that keeps him hooked.
maybe he feels a sort of obligation to her so powerful he's willing to overlook all the negativity. maybe he craves the rise in social stature that being in a relationship gives you, especially if shes attractive.
there's always a reason.
hopefully this isn't too hard to understand.
_________________
הייתי צוללת עכשיו למים
הכי, הכי עמוקים
לא לשמוע כלום
לא לדעת כלום
וזה הכל אהובי, זה הכל.