Is it normal my family doesnt know what my voice sounds like?

so im 18, i have a pretty low voice, but ever since i was twelve and started noticeing the change, i hid it. i sound like a girl when i talk to my parent or anyone who knows them or is around them. i never have freinds over because my freinds would make fun of the way i talk and i almost dont want my family to find out about my voice. i think it stemmed from the fear of growing up and now its to the point where it would just be awkward to go up to my mom soundin like morgan freeman. like oh yeah hi mom btw ive been lying for six years about my voice. yeeahhhh. is this normal. am i the only one?