Yes I think it’s wise to be careful about how often we unload to friends, and keep good boundaries. Support imo isn’t always about listening to our issues, sometimes just going out and having a coffee or whatever, in nice surroundings can be supportive in itself.
To say you weren’t making progress in a few months is a little confusing to me. You’re describing life long issues, I wouldn’t think it realistic to see progress within a few months. What sort of progress was she expecting?