Only turns on in OSX Recovery, Disk Utility can't repair disk

Hi guys, I really need your help, as my Macbook Pro running on OSX Mavericks is having problems.
Today I turned my Mac on, and it started up with a loading wheel and a loading bar. When the loading bar finished, the Mac turned itself off. I tried many times, same happened every time. I then went into OSX Recovery, started repairing Macintosh HD, but the error message saying "Disk Utility can't repair Macintosh HD" came up and now I don't now what to do.
Is there any way I can back up my files in this situation?
Is there any way I can repair the disk without having to erase all data and reinstalling OSX?
Or do I really need to bring it to a Apple Store for repair?
Thx for reading

If you have access to another Mac and both computers have the appropriate connects, try the Target Disk mode to see if you can copy the files.
Target Disc Mode
Is there any way I can repair the disk without having to erase all data and reinstalling OSX?
No.

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