Happy 21st Birthday!!
We cant give you a party but I don't want to let it go by unnoticed. My real dad once forgot my birthday. He lives 200 mile away from me and works a lot but still it hurt. Instead of disconnecting yourself from your family how about trying to write a letter or note telling them how you feel. I know it is much easier to act like everything is okay, your fine and just go one being hurt with it inside but you really should address the issue with them. You are entitled to feel hurt, anger and maybe even a little jealousy. We are always here...take care