My friend is getting my facebook messages please help!?

[Shinegirl]

I have an iPhone 4s and I logged out of Facebook and I let my guy friend get on his account on my phone. He went to his messages and I saw that he can go to my messages. It had my name and the people I was talking to like my friends and my boyfriend.. I don't want him to see.. Can I fix this please? Anyone know?

[Alondra Sandoval]

change your password or log out of his phone. if you change your password facebook will have to make anyone whos logged in your facebook to log in again and he wont have your new password and youll be fie 9:

[Annabelle]

First off, log out and delete all history, cookies etc. Turn the phone on and off. Then go on a lap top or computer, log in and change your password, perhaps email address too. I think he may have logged on to yours as that's not really possible.

[Drizzy]

Change your password, and choose an option "Log me out on other devices"