It's awful growing up different than everyone else and being alienated like that. I'm sure this must have been a tough, confusing experience for you, especially not being diagnosed until an older age. I had a similar experience, however, I was diagnosed very early on. Still, I never associated ADD with the way people treated me because I wrongly assumed they were laughing /with/ me and not at me. It was really depressing to realize a lot of people I considered my friends were bullying me. So sorry this happened to you.