Don't feel you need to change your personality to act more bi, make sure that your friends realize that you wanted to be truthful with them, and are still the persom they are friends with. If they totally blow you off, then go find some new friends. You can also try to convince them to go to gay-straight alliance meetings, if your school has them. I know that so many times, bi people get swept to the side in gay friendly groups and organizations, becuase people want to understand sexuality as an either or. Good Luck with it all.