What do i do, if i know someone that hacked into my Facebook account?

Change your password to something that is actually secure from your home computer. Make sure your computer isn't compromised and run a full anti-virus scan on it. Never access FB from a computer or "device" that is not yours. Computers you don't own may be running key loggers that will steal your password and your account may be compromised. Keep your anti-virus definitions current and the anti-virus program is active. This will prevent malware key loggers from stealing your password. As far as the "hacker", he probably didn't hack anything. You probably gave him your password in a way that wasn't obvious to you. Legally, what are you going to report? Proof of damage is so small that it probably wouldn't even be investigated. Even with a witness, it is still unlikely that anything will happen. The threshold for criminal activity is a lot higher than a FB password that might not have been secure in the first place. Shadow Wolf