I was a totally different person than I am now.
When I was 13, when I was in full puberty, I did not feel good about myself, I even got angry with people, I really got angry with myself for being what I was, and I envied those people. I had a lot of acne on my face, I was skinny, yes, but at one point I started to get fat, not just a little, I did not recover and was not organized at all. My attitude was very different, it was intelligent, as I have always been, but I always changed my attitude when I got new "friends", they made me who I was not. I did not feel good about who I was, I was not sure of myself.

Then one day I decided to change, I wanted to be someone I was proud of. I changed my eating habits and started to eat better, I exercised, not so much, enough for my age, weight and height. I went with a dermatologist, who gave me 2 creams that helped get rid of acne. I learned to love myself, to trust myself, not to let people change what they really were. I learned to be who I am, I must say that I am very proud of myself.

I do not want to brag (and I do not think anyone feels I'm bragging), or I don't want them to feel bad with yourselfs.

If you do not feel proud of who you are, change, change into who you really are, not what others want you to be.
Learn to love yourself, and do not let anyone make you feel bad, because you are much more than you think, you are worth much more than everyone thinks. LOVE YOU AND LOVE THE WORLD. DELIVER HAPPINESS, AND YOU WILL GET GOOD THINGS.

Work hard so one day only your first name will be enough to recognise you.

Your mind will believe what you continuously tell it. So tell it that you're smart, ambitious, cute and not afraid to go for it.

You should work hard to be someone you'd be proud of.
You still have a lot of time to make yourself be what you want.