It sounds to me that this liberal was the one who decided to stop being friends. At some point though, you do reach the end of the rope with liberals, and that's where you get the "So where are the revolutionaries coming to save us???" type shit. That though, is probably a result of too much theory and not enough practice, at least in my experience. If you don't have the ability to be like, "Why don't you come to an event with me and my party/org" because you're not in an organization, you really have no way of demonstrating what you're talking about to anyone. It's a lot easier to say "Well, I'm doing " than it is to say "Well you should be doing ". People are probably more receptive to the former than the latter.