Twenty is young in my book. You have plenty of time to find someone who believes in your values--and they do exist. But, I am bothered by your thinking you don't want to have sex at all--even in marriage, xxxyyyzzz? God designed it and blesses it in marriage. It's a special gift between two committed, loving people. And children are a gift from Him. (My take on it. I know some people disagree.)
I agree that you need to talk to someone about your aversion to sex, dear one.