Alex if you do not want people or old friends to think of you the way you were in H.S. show them who you are now.
Your dad is right about getting out and meeting people in "real life". Enjoy your youth. Have fun with others.
Sitting on your computer and communicating with others does not give you a realistic view of life. If you think I am wrong about that try meeting with your friends from the computer. I always say AOL< YAHOO whatever, be all you can be, cause that is just what many people do on the computer, they are all they can be on the computer and in real life.......not so much.