Get real. Seriously - that's my advice. I know it's not that easy, but ultimately what you are describing is very mature and sensible. You are starting to see how shallow all these designer fashions are and how they don't really have nay bearing on you as a person. you want to be seen for more than what you wear or how much money you have and you want to try and get to know others on that level as well. I think you have to make a statement. At the end of the day, if you continue to follow the crowd and go with the fads then the only friends you'll make are the people that do the same thing, If you make a statement about your individuality - no matter how hard that might be - then you will make friends who think similarly to you as well.
iT's all about attitude - you will attract people who have the same sort of attitude as you are putting ut, so the easiest way to change one is to change the other.
That's not to say it will be easy - going against the crowd is never easy - but it sounds like you think the crowd in this case is wrong and is pretty shallow. ALl I can say is that you have to do what's right for you and I think if you want a more meaningful life then there is no better time to start than now. Otherwise you could find yourself trapped in these superficial and shallow relationships with people for your whole life.