That voice inside your head is an amazing tool that is your insight into making smart life choices. You may not believe in the power of the universe, but those whispers are coming from somewhere and definitely trying to tell you something.
When you shut down in a relationship it automatically shuts your partner out. They will eventually start to pull back because they are feeling a disconnect from you. This can cause all sorts of uncertainties and insecurities between you as a couple if it is ignored for a long period.