Who did this kid hack my PSN?

This kid I know wanted to game share Minecraft with me. I didn't really want to cuz I think game sharing is gay so I just told him I forgot the password. He asked for the email so I just made one up. Later I was at a friends house and I tried logging into it and it said the password and email were wrong. Luckily, the kid sent me what he changed it to. I don't really mind but how the hell did he do it? Please help so I can prevent this from happening again.

Added (1). There's no way he guessed both the email and password… In about 10 minuets? I never gave him the real email for it. How did he reset my information?

He could've just guessed your password.

There's no way to "hack" a PSN account.