It's not an art block. It's a loss of passion. Never before in my artistic career have I felt so far from my goals, even though I'm much closer to them than I've ever been in reality (first commission). I don't know your exact situation, but I'm assuming, maybe prematurely, that it's similar to mine. Rekindling the passion we had before is by no means easy, as I've been trying to do it for months now. I've read psychology books on personality ethic and work ethic. Drawing is still extremely fun for me if I can ever get to doing it, but it's like there's some force keeping me from touching my tablet pen or traditional pencil. The books on work ethic just say to be optimistic and never give up, and the personality books say to change your very nature in order to achieve your goals. Right at this moment, I'm motivated to draw, but it's 12:30 AM and I've got church tomorrow. Today. Last time I was motivated was 2:00 PM earlier toda--yesterday. Then, I had to go to work. Now, I have to go to bed. It seems like I procrastinate through my free time and only ever want to draw when something less enjoyable is the alternative. Yes, I find sleep less enjoyable than drawing because I can't do anything.
Prolonged art block or a total loss of passion, I don't know for sure. Either way, we're still artists and giving up is the only failure we're capable of creating.