How did you coop when you learnt that not everyone will like you?

So I remember back in middle school there was this girl and she seemed to be one of the coolest girls we know. She told jokes, funny, very talented actress and very kind to her friends. I wanted to be friends with her but she always gave me dirty looks. When I said hi and was nice to her she coldly said hi. When I walk she ignores me, when I come in, she walks right out of the room. She looked disappointed and gives a frown when I see her. I think she’s scared of me because of my 5’11” 3/4 and large built frame. I didn’t do nothing to her. She seemed so cool but she didn’t want anything to do with me. She prefers to hang with my two best friends but not me. She was having a party snd only invited my best friends but not me. I did NOTHING to her. I did a lot and she STILL didn’t like me. One of my teachers told me, “You listen to me very carefully. This is very important. Not everyone is going to like you. No matter how cool, sweet, awesome or even talented you are, you won’t be liked by everyone and they’re allowed to not like you no not obligated to like you or be your friend.”
That’s exactly how she said it. She was a brutally honest teacher and didn’t sugarcoat NOTHING. She spoke the truth, even if it painful.” I told her she wasn’t making me feel better. She flat out said, “I wasn’t trying to make you feel better. I’m just teaching you a lesson and I’m saying it because it’s the truth. You love yourself and do you and it doesn’t matter if they don’t like you.”