Help! My MBP won't boot up - stuck at gray screen!

[SuperKerem]

Well, a few days ago I noticed that sometimes it would get stuck at the white/gray boot screen and wouldn't boot up. So I just shut it down and booted it up again and it would boot fine. But now, no matter how many times I try, it won't boot up! I tried resetting pram etc., repairing permissions, repairing disk, even reinstalling OS X ML using the recovery partition!
This is exactly what happens when I try to boot it up:
Normal apple screen with spinning wheel
Then spinning wheel goes away, just the apple logo
Then the spinning wheel appears again
The spinning wheel goes darker for some reason
The spinning wheel freezes
The spinning wheel looks like a frozen black sunflower of some sort
And it is stuck there

However, my Bootcamp partition still works fine.

What's going on with my MacBook Pro (late 2011, dual 2.8 i7)

Thanks in advance

 

[Chuck-Norris]

wipe it and restore

or take it to the apples tore.

we cant really do anything here for you LOL

 

[196josue]

Try booting to safe mode. Hold shift key on boot. Sometimes that may fix the issue.

 

[zaazu48]

I have same problem.... it refuse to boot to safe mode as am begining to think it is not working

 

[simon48]

Try verbose mode (cmd + V on boot) and see if you can tell what it's hanging on.

wipe it and restore

or take it to the apples tore.

we cant really do anything here for you LOL

No need to jump to extremes if you can't think of anything, especially in a situation where there's clearly other options left.