I actually was at that stage a couple of years ago - I couldn't get anything done, which made me feel bad and depressed, which made me not get anything done. I couldn't even start doing something in a meaningful way.
It's such a bizarre thing to think back on that I can't even fully empathise with my former self..
This is what made me realise what was going on and rectify the situation, it all just "clicked". I had been doing this since early high school at the time.
Why: http://waitbutwhy.com/2013/10/why-procrastinators-procrastin...
How to beat it: http://waitbutwhy.com/2013/11/how-to-beat-procrastination.ht...
The thing which really worked for me was realising that if I really work and try hard to work on something for even lie 10 minutes, I can get into a flow state and then it's easy. And from there it was just baby steps forward over a matter of a couple of months until I remember getting into a flow state all the time and thus my mind thinks of it as "easy" and it is.
This is exactly the same experience I had when I was younger and learning to feel confident talking to girls. It's really hard, but when I'd done it all the time for a while I have enough semi-recent memories of me doing the thing, that the thing seemed like an easy and normal thing to do.