I bet that must be a struggle to deal with. You know, I always thought that it is not so important to come out to one's family. Maybe, you could keep it to yourself a while longer until you feel more confident in coming out.
By the way, on a small note, I used to think that I was an aromantic ace as well until I got my first boyfriend. A little bit later, I figured out that I liked girls as well so yeah... I kinda went from asexual -> heterosexual -> bisexual... who knows, what happens next? :D