It’s Not You – Facebook is Broken!
It's not just you. Your phone isn't broken and your computer is OK, Facebook is the one that is having problems.
If you were trying to like your friend's picture you probably got this message: "There was a problem updating your status. Please try again in a few minutes."
The word is that this is a large, even global, service disruption for Facebook. So, you'll have to try again later.