First of all, I'm not a teenager and will not be on your cruise, but I know from experience that you will find some cool people to hang out with - even if no one replies to your post. I have been on 3 cruises (4th is August 12) and have met new people and made new friends every time. Are you going with your family? Even with them around, you'll meet some people. Don't worry because I would think that being in the summer there will be plenty of people your age on the ship and I'm sure you'll have a great time!