I recently showed someone a non-musical project of mine, and they said "I can't wait to see what you do with that next," and now I can't work on it at all. It was like magic. Because of this,  I've come to a hypothesis that my a lot of my recent creative block with music is caused by thinking about what other people will think about my music, because my block started around the time I started showing other people my music. Does that sound like a plausible hypothesis?
yes