Teenage Bedroom - HELP !?

I am a 15 year old teenage girl. You see,when I was very young, I bought all this pink girly stuff like wardrobes which have glamour printed all over them and its all pink and looks like an eight year olds. I cant afford to buy new furniture or get my room redecorated ! I am too embarrassed to even invite my friends over! Please help me try and make my room look more teenager-ish. I'm not very artsy and PLEASE HELP ME! Thank you.