I think what he meant by saying he was the only one bringing anything to the table was that, he was the only one putting his friend before himself at times by inconveincing himself for the good of his buddy, and never receiving that same action and effort when he was the one in need.
I have had lots of friends that have been around since i was a little kid and as we grow up i realize that most of them arent true friends who are THERE FOR YOU when you need it, alot of people simply bail when the situation no longer benefits them.