I have reached that point before, when you feel like everybody's agony aunt.

I can say all I have done to deal with that is weed out the ones who are there for me back, and not really respond too much to the ones that don't. Sounds harsh but I used to get very upset by people leaning on me and then not doing the same.

I think enfjs have to grow a thicker skin as they age :-) it helps.