Does my mom have a right to be so mad at me?

I don't think she's mad she's hurt. When you agreed to go for a walk with her and then went back home and watch TV then to her that was a mother-daughter time that could have been. Try seeing it from her point of view before you judge, don't jump to conclusions.

Did you tell her at the time that you didn't want to go out because there were boys out there, or did you just say "I don't want to go"? Because if you didn't tell her specifically why, it looks like you bailed on going for a walk with her so you could sit home and watch TV.

I think there's a problem with communication here. This is probably not the first time you've done this, which could explain your mom's rather over-the-top reaction.

You need to talk with her about all of this. If you think you have Social Anxiety Disorder, go to a doctor and get a real diagnosis, not one from the Internet. If you read enough stuff like that online, you'll end up thinking you've got cancer, MS, and everything except prostate disease.

Seems like you could benefit from therapy.

Edit: Kitten, you don't diagnose things with "online tests." This is why doctors go to medical school. There are two sides to this, you know.

Of course not. Tell her, or show her by like an online test that proved your disorder so she will understand:)