MacBook Pro Retina stopped connecting to my wifi. But all other devices still work on it.

My MacBook Pro Retina stopped connecting to my wifi. But all my other devices still work on the wifi. I can connect to wifi on the MacBook through my personal hotspot on my iPhone 4S. I have not changed any settings on my wifi network, and I have not changed any wifi settings on my MacBook.  Please help!

Care to share which OS you are using?
Have you read for possible solutions over in the "More Like This" thread over here?-----------------------> 
Change your router channel number.  Most times this works & is all you have to do. 
System Preferences>Network
Click the Assist Me button.
In the next window that pops up, click the Diagnostic button & do the necessary.
Research Knowledge Base for network problems that pertain to the OS that is currently installed on your computer.   See these basic networking KB Articles:  http://support.apple.com/kb/HT1401 AirPort troubleshooting guide
http://support.apple.com/kb/HT2712 Using network locations in Mac OS X
Manually provided DNS server addresses are higher priority than DHCP's
http://support.apple.com/kb/HT1714 Solutions for connecting to the Internet, setting up a small network, and troubleshooting
============================
What to do when you can't connect to the Internet
Also, run the Airport Utility app which is located inside the Utilities folder.
=====================
If using a  Linksys router, contact LinkSys Customer Support and/or post in their forums.
If using Apple's Airport, please re-post over in one of the AirPort Forums.

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