Seems to me you need to forget selling for a moment and think about what was that made you want to ride bikes in the first place.
You've invested a lot of time, money and injury to get you where you are right now. There had to be a reason why you set off on this road in the first place.
If you're really no longer interested, cut your losses and walk away. However, if you've simply lost confidence because of your mishaps, that can be rebuilt. I can't endorse strongly enough all the suggestions here to get advanced training (RoSPA, local police initiatives, the IAM are a good start) and to seek out other riders as mates and mentors.
From your profile, it looks like you've done the 125 & 600 thing on your way to the Fazer 1000. Although a bit weighty compared with the smaller capacity bikes, the Thou is very forgiving bike and shouldn't run away with you power-wise.
Even if you still feel right now that you've had enough, if you can afford to keep the Fazer parked up for a month or two, I'd do it. You won't believe how many folks have rushed to get rid of their bikes only to regret it a little while later. The cost of buying back in is way more than the cost of holding on for a short time.