Depends on the kind of friendship. If close, I would, since we would both know I'd return the favor, AND close friends really like to help when they see someone they love struggling. Letting someone give is good too.
"My predominant feeling is one of gratitude. I have loved and been loved;I have been given much and I have given something in return...Above all, I have been a sentient being, a thinking animal, on this beautiful planet, and that in itself has been an enormous privilege and an adventure." O. Sacks