Lyric discussion by Tomotoms 

Cover art for Winterlong lyrics by Smashing Pumpkins, The

I think the song is about being in his band. The opening line "if I fall into you all" I see him stood at the front of the stage playing his acoustic contemplating falling into the crowd. The line "some feel movement others stand still" is about how the audience reacts to slow songs like winterlong. The rest I think is about band dynamics and recording music together.