All of us get to a point where we area discouraged and ready to give up. We have brick walls that seem insurmountable. Before you decided to give up, ask your genealogy buddy to take a look at your research.
I know, you are thinking what can they see or know that I don't see or know. You may be pleasantly surprised. All of us have different methodology and thought processes. Be open to hearing what they have to say. You may think you know more, you may really know more but what you want here is a fresh perspective.
As a matter of fact, I recommend swapping genealogies for a week. You work on theirs and they on yours. Who knows, it certainly can't hurt and getting a fresh set of eyes to look at your old problems may help you break down that wall.