I need help?

[Rory]

Does anybody know how to hack a facebook? My ex did me wrong and i want to get him back...

[abraXus]

that's illegal

[Peeter]

No dear, it is not possible, or can say it is illegal, so don't do this.
Facebook also be implement tight security, and privacy.
Otherwise, for this issue, use page fishing, it is something like hacking, hope this will help you.

[Sativadiva]

Although not stooping to his level would be a much better route..
If you can answer his security question he has set up for his e-mail that he uses to sign into facebook; then you can send a password reset from facebook to his e-mail then change his password on fb and sign in that way.....
other than that, nope..and again...you should just prove you're better than him by not even responding.