How do I tell my parents I never want to get married?
Move out of state and visit them during the holidays once a year. Parents mean well but sometimes they can be a pain in theass, and you do NOT want to end up getting married to some guy they threw your way just to shut them up and settle for someone you aren't even in love with. Marriage is very serious and honestly, there's nothing wrong with dating long term and never getting married, why get the government involve in your relationship ? If you ever divorce it will cost you a ton of money, how many people don't stay in miserable marriages just because it's cheaper than divorce ? You don't want to be one of those people. Spend less time around your parents and ignore them when they talk about marriage and kids, if it's not for you it's not for you, don't let others dictate how to live your life.
Tell them it's your life and your going to plan your future the way you see fit!
Just tell them