What you are describing is exactly what was said way back when Freud "invented" psychotherapy, the talking cure. Someone asked, but isn't that just what a friend would do? (listen forever, advise, etc) And Freud (I believe, or a contemporary) replied, "Ah, but where would you FIND such a friend?!"

So no need to feel like a failure. No need to reinvent the wheel! Everybody is given a limited number of hours on this earth, and talents. We are responsible to decide how best to make use of what we are given. Just because somebody asks us for something! - you know, take care of yourself so you CAN help others. That's what boundaries are for.

Given what YOU have been doing, sounds like this person should have offered YOU some help! I would, but I'm lazy!