You are very mature for your age and I applaude the fact that you want to get married at 22. There ARE guys who want to be married at your age. However, they often become timid because of all the women your age who don't want to be in serious relationships at this stage of their lives.
With regard to your family, tell them it's NONE OF THEIR BUSINESS WHO YOU ARE WITH. If they are Christian, quote them the verse where it states: "What God has joined together, let man not separate." In other words, God is the one who puts people together whether they are black and white, Hispanic and Asian or Martian and Earthling.
There's nothing wrong with you. Your parents are Archie Bunker incarnate and need to grow up. If you need to, go underground with your relationships.
Good luck to you.