I think I might have social anxiety disorder, but I don’t want to go talk to a therapist and find out it’s just shyness. that would be embarrassing.

I am not an expert, but I have been diagnosed with social phobia. Are you scared to go into stores because you can’t handle interacting with the person at the register? Do you feel like it’s your job to make a restaurant’s waitstaff feel good/happy? Are you scared to call people on the phone? Are you scared to answer the phone? Do you avoid almost everyone you know? If you are "shy" around people you have known for a long time, then that is a good indication as well. If you feel worn out from taking care of people’s emotions, then that may also be a sign of social anxiety. Do you have a fear of what people will think of you? Even strangers? Are you scared to be yourself? Do you feel like you need to put a face on when interacting with people? Like you may be having the worse day of your life, but you act like the happiest, most outgoing person when talking to the person selling you a movie ticket? If you answer yes to some of these questions, then you are probably more likely to have social anxiety then be shy. Being shy means you are slow to warm to people, but once you do then you feel at ease. Good luck!