I'm not going to invite my family to my wedding...but I'm going to invite my friend's family
Why would you invite your friend's family, but not yours?
I feel they are more family to me than my biological family.
Your own family may care about you much more than you think. You don't have many weddings in life and if this is your first, you may regret it later.
I want to make them feel bad for how they treat me and rub it in their face.
Your friends that do show up might feel awkward if you realize nobody in your family showed up. I think you should talk with your family before you decide against not inviting them.