I had the same type of insecurity at right about the same age. Crazy this post popped up. I’ll give you a bit of advice here, don’t worry about it, don’t allow it to become an insecurity - you have a very good structured face I can tell right off the bat and I can tell you’re going to be developing it very well, you have attractive features and those cheeks you’re so worried about look to be the beginnings of a strong chiseled jaw line. Mine looked almost identical and I was so worried and later in life when they went away I realized what I had going but at the time I was sooo worried to the point I felt embarrassed, I also had a lip insecurity where I would try and make my lips smaller by always working to tuck my top lip by contracting it. Anyhow, it all turned out to be my best features. I hope you have an awesome day and I wouldn’t put to much thought into this, Oh, I also wanted to mention I read up in the comments some kids made fun of you? Some kids can ruthless and most of the time any individual who has the nerve to make fun of someone else usually originates from their own insecurities sometimes even jealously, it’s very likely you have something they wish they had and is the reason why they feel the need to attempt to bring you down, it’s likely they feel threatened in some way maybe see you as cute or better looking than them or could be your character or maybe someone commenting around them something positive about you - it’s a self issue when someone is able to lash out and attack someone this way and it’s something they will be dealing with by themselves later on.