I wish it was like that, i always considered them as our brothers. Recently i went to an Afghan resturant here, there were flags of all countries but Pakistan was missing so my friend asked why wasn't Pakistan flag there (most non Afghan customers are Pakistanis). He said " no Afghans customers will come if we put Pakistani flag" I lost all the respect for Afghan people since that day.( not that it's a huge issue but just the way I feel).
I had a completely different experience. I met two students who hailed from Afghanistan studying in UK and they told me after being taken as refugees, Pakistan took good care of them and Pakistan should work harder to make Afghanistan a more livable country so that more Pakistanis have a good opinion of Afghanistan.