When you really like a boy but they don't like you

There are plenty other "boys" around, so go and find another.
We will not give you advice on flirting as you are a minor.

At 13, you really shouldn't be flirting. You need to talk to your parents first about whether they allow you to date and other aspects of romantic relationships. Don't try to grow up too fast.

You can't force someone into liking you, and you should never change how you are or how you act to trick someone you like into liking you back. If he doesn't already like you for who you are, then you need to move on. Someone will meet you one day and will fall in love with you for the person you already are

Thirteen is a child and does not need to be flirting. Depending on the age of the boy it can even be dangerous or wrong.

Take time to be your age and wait for it to happen.

Next you can not make someone like you

Concentrate on school, on other activities, and leave the boys until you're older. You're really way to young to be dating anyway.