Being picked on for having a permanent unamused face

I am a teen who has really bad social anxiety, uncomfortability with being touched, and a constant unamused face due to my autism, and my family is always picking on me and acting like I hate everyone or dont wanna be around because of it. I hate it so much :( My little cosuins think I'm scary and want nothing to do with me, and the rest of my family makes fun of me for being a "whatever" kind of teen when I'm not. When I go to haunted houses or corn mazes I always get targeted super heavy by the actors cause idk I guess they think I'm trying to act cool by not reacting at all or something but I just don't express my feelings externally that way :( everyone is always calling me this and that and emo and depressed (not that I'm not those things haha) because I'm so quiet and unexpressive. Just gets on my nerves, I'm tired of being perceived this way when I'm genuinely a loving and joyful person.