Oh, this is one of the toughest things in the world to get used to doing, be yourself.
Try to be as outgoing as you are with your friends, and the people that like your style will come, those that don't you probably don't want to have anyway. This will turn out better than you think it will, especially since you already have friends that you can be with if things don't work out, however, they probably will work out. Do what you think would turn out well among your friends. If you think something is funny, make a joke about it, if you think it might be inappropriate, don't. If you think something might not be working, then try to adapt around it. I've still made friends out of people that originally thought i was annoying. As for boy's it won't be hard, it might even be easier. Again, just trust your instincts.
It's that simple, yet, unfortunately, it never seams that way.
Trust yourself to say all the right things.;D
my experience as a high-school junior