Girls at the club think I’m being an bitch

I get facial tics , I’ve had it since I was little , I never noticed but people kept pointing it out , so I can’t control how my facial expressions go , it’s ap random , sometimes I blink constantly or I look really mad or it can be complete opposite, I didn’t know until my parents told me. One girl has fell out with me over it. We used to talk every night, it was only friendly small talk but I had an tic and she must have seen it because she keeps giving me dirty looks now. I want to tell her I’m not trying to be an bitch , it’s just my face , but I’m really scared because I don’t want an huge fall out as she’s told one of the popular girls now she’s stopped talking to me too. I hate it sooo much. I have an friend who has them too but is currently away. Another girl was acting the same until my friend talked to her now she’s alright with me.