Our friends have a influence on us.
Let's explain my choose. If you see that your best friend have's a nike bag , you're jealous and will buy the same or a homogeneous shopping good. Or this situation ; your with friends , their weiring jeans and a T-shirt , if you fit on a skirt , than they will laugh.
You don't want to laugh them about you so you will wear the samo clothes like your friends.
People just get together pursuant to their interest , most of the time , clothes are a collective interest . But even than you have a influence on eachother. Because not everything you like , does your friend likes.
But if you have a very strong charakter than your friends haven't any infleunce on you.