What are some things in hindsight that should have been giveaways that you had some form of social anxiety?

Some personal examples that come to mind are:

• Being late for work because I heard the people in the apartment next to me leave and I waited five minutes so I wouldn't have to share the elevator
• Cleaning my house for two hours before strategically placing items I can talk about just so I can have a friend of multiple years over and after they left replaying things I said to make sure I didn't say anything embarrassing
• Not being able to look my Tinder date in the eyes even though we've been talking for a month and we had planned to have relations that evening
• Spending $200 on a sweater at a craft market because I worked up the courage to ask the price and couldn't bring myself to say no thanks
• Forgetting something I needed at a store and just leaving because I didn't want to face the cashier

They're all things that are silly in hindsight that I later realised the average person likely wouldn't have done. I know no one would have really cared in these situations.

Just curious what stories people have.