I've run into this plenty of times in my life too.....
I work alone, though sometimes I'll bounce ideas off my husband to get his opinion and feedback. We are thinking of starting a small, silly webcomic together too... maybe. He's about the only person I know I can rely on.
I did try to do a webcomic before with other people and I was going to be inking the pages, but it felt like it wasn't really going anywhere and then the member who was holding the group together moved to another state...