Why am I so shy around big crowds, but when I'm with one friend than I'm fine?

You may suffer from social anxiety. You should also talk to a professional about this. It may be medical or it could be psychological. Only someone who is educated and license would know.

Social anxiety is probably the cause of this. In my experience, I am fine talking to my therapist, or a friend, but as soon as you get me in a restaurant or in front of a big crowd, I freeze up and get very shy. You are not alone!

Some people are natural introverts, that means they are more comfortable in one-on-one interaction than in bog crowds, and there is nothing wrong with that.

it is not uncommon for people to fer large crowds. there is a lot of noise and interactions going on in a large crowd, it overloads your senses.

Big crowds can induce anxiety for many people - so you're not alone. Normally, people are calm and comfortable with a trusted friend. You've spent time with them before, you know each other's likes and dislikes, etc. With large crowds, you may feel overwhelmed due to the fact that you do not know anyone, or do not like the attention on yourself, or are unaware of what could happen. Start small if you would like to conquer this! Gradually increase the amount of people you spend time with, and see how you feel. Baby steps! X

You don't know the people and you are not on that deep stage of personal information with the people in the group like you are with that one friend. It's all about personal relationship.

Because you are an introvert and that's a part of your personality. It can go away slowly but it's nothing to be ashamed of.

Generally in big crowds you are unlikely to know anyone, so when you have a friend with you it can be a comfort to have someone you know and someone who knows you. Friends can be a huge support because of this and could be why you're fine when with one :)

I guess because you know this friend somewhat personally, or enough to consider him/her a friend anyway, you can be more confident and open around them.

I'm an introvert too and big crowds can be confusing for me at times or I'm simply not too active/outspoken in front of them but when I'm with one friend or even three or four I'm totally fine. And it's okay to feel that way because it means I'm completely comfortable with my friends but not so comfortable with big crowds.