I think it might help to have a friend to bounce ideas off of (whether RL or not). A lot of problems I personally have are from thinking that one path to get to a major node isn't 'good enough', and it makes it hard to continue without having someone else say it's solid. Dunno if that's your problem though.
What I did with the first branch of Undead Persona was have a solid idea of what I wanted to happen, including the climax and what brought it to that and, while I can't vouch on whether it'll end up good or not, the bottom line is that 125-paged (varying word lengths) storyline is actually finished. For that though, the protagonist had a pretty forced impetus and the story just kinda followed that. Did your ideas have a 'goal' in mind? Not just a final-scene, but an actual thing pushing the character forward?