Am I actually ugly

It’s pretty easy to say that i’m an insecure person but I always wonder if other people relate to this. If i ask my friends or family i’m afraid they won’t tell the truth. I have been told that i am pretty mostly only since i was around 12 years old. When I started 7th grade and going on into high school people would randomly tell me that i’m very pretty. Idk if that’s a new way to get friends or what. I’m appreciative of people telling me this often but like i just never believe it. When i look into the mirror, my face is distorted and changes all the time to me so i can’t really tell. once every blue moon i will think i look pretty but quickly the next day and for the rest of the month i’ll think i will look like the ugliest person to exist. Is it just average girl things to randomly tell other girls they see that they are pretty and I just don’t know it?