How to deactivate your account
Firstly, you have to know if you deactivate your account what will happen. Your profile will be removed from the website and with all the posts you have made.Like your messages, friend requests, pokes and all that. But Facebook will still retain your data in case you decide to come back. You have the option anytime that you can come back to the website and reactive your account just by logging into your Facebook account as you regularly do.
So, to deactivate your account, log in to your Facebook account and select settings menu in the upper right corner (represented by a gear icon).
Secondly, select Account Settings from the dropdown menu.