How do you please your girlfriend at the age of 13?

I can't get a girl to like you. Only you can.

She doesn't even have to like you, in fact, she probably has neutral feelings for you. Just ask her out- the worst thing she could do is say no.

Ultimately, you can't force people to like you. You can make a good impression on someone by being personable, but there's no way to hypnotize a girl to get her to like you.

If you want her to be infatuated with you (which you will probably regret since you are only 13 and will soon lose interest in her), start by flirting with her before making your move. Get your girlfriends the way you get regular friends.