Advice:

(have you been playing only 6max cash?)

If so, give full ring a shot, maybe try some MTT's, or SNG's etc to give yourself a break from 10nl 6max. You've sound like you're sick of it so in order to get things back on track I would change the game you're playing for awhile, even if it's only temporary.

I only recommend this because it helped me break out of a really bad stretch. It worked for me but may not be for you, though it probably wouldn't hurt to try. It should keep your mind off your 6max results for awhile. Then once you switch religously post hands and review sessions to find out where you're messing up. Once you gain your confidence back, return to 6max and you'll do fine.