You'll probably be into Habbohotel.com
I don't play anymore, but when I was 12, 13, 14, 15, 16, and early 17 I spent a great amount of time on this site. It was better in those days. I hear now they update it way too much and try to turn it into a myspace/facebook.
Anyways Habbo Hotel is a virtual chatsite where you can meet up with your friends in a virtual hotel. You can create your own rooms and let your creativity run wild. It's free to join, but to enjoy some fo the exclusive clubs like Habbo Club and buy the currency (which you use to buy furniture) will cost you real money. Trading is open to anyone so you can win furniture and get gifts from people. I've never spent a dime on habbo, but my fortune had reached over 5,000 dollars.
World of Warcraft is better for the older crowd and runescape is good for guys.