Anyone else have this problem??

So I’m going back to school soon, and I met up with my bestie and her cousin. I told her i was going into grade 8 and she started telling me i was lying i look too old. Sure sometimes it’s nice to look older but ppl keep telling me that i’m lying about my age and its REALLY starting to get on my nerves. i went to the movies with my family and i used a kid pass (cuz i’m still 13) so we didn’t have to pay more and the lady who was checking the tickets told me i couldn’t use it bcuz i was older. my mom started denying it but we had to get the manager involved about it and in the end they just let us go through. this isn’t a question so much as a rant, but i hate the way i am.