Just think through the worst possible scenario. Maybe the ticket counter person has their own issues (I’m imagining like a Mean Girl Teenager?) and questions you condescendingly for buying just one ticket.

If that happened, which one of you do you think actually has something to be embarrassed about? You who just wants to see a movie, or that person who acts unkindly towards a stranger?

There is absolutely nothing wrong with or embarrassing about seeing a movie alone, know that in your heart and let it give you confidence.