I haven't told them. I once tried, but before I even mentioned being aro ace I got something along the lines of "You just haven't met the right person yet" back and then I gave up. My parents are constantly making comments like "one day when you have a boyfriend...", "I can't wait to meet your future boyfriend...", "one day when you have kids...", "when I was your age I've already been together with your dad". That's the only reason why I even wanted to come out, so they would finally stop, but I doubt they'll understand