How to be the person that can get along with ANYONE?

I do not want to ruin your hopes or anything but the best you can be is the person you are. If you are not naturally friendly or bubbly, it may not work for you. You can try to be more social or friendly, but you can not completely change who you are. First of all, do you want to be popular or do you want to be loved? Not everyone will accept you. This popular girl you speak probably has enemies but just manages to brush it off. She has confidence in herself and her friendliness is her most attractive quality. Friendliness may not be yours, I am not saying you should not try to be friendly, but your most attractive quality may be your honesty or your integrity.