It is also possible that the inability to pay back would negative effect the friend's ability to maintain the friendship. Between feeling they let the loaner d

It is also possible that the inability to pay back would negative effect the friend's ability to maintain the friendship. Between feeling they let the loaner down, or feeling guilty they couldn't repay it. Even if the loaner set no expectations, it could create enough negativity to sour the friendship. This doesn't have to be logical or rational, it could be an entirely irrational emotional reaction.