Panic.
But really, relax.
None of the paths IIRC exclude each other; that's to say; it plays out more like a kinetic novel where even if you dont do something (like talk to Val during movie night) you can talk to her on a future movie night and it'll will continue the story. There's only maybe (2?) decisions I can remember that were semi-permanent; one having to do with sex-preferences and another having to do with the way you handle the gang's competition.
So yeah, I'd just sit back, relax, keep playing, don't worry about branches; just do whatever you feel like on a given day, whether it's hangout with Val or go visit Gang Girls or go to your own home, etcetc. The game won't punish you for your choices.