I too had a serious accident (5 days in hospital, 6 weeks off work). Please realise that the low mood you are feeling is part of the accident and is normal. It's due to the painkillers, the healing your body is doing etc.

Don't make any major decisions yet. Think over the accident. Was there anything you could of done to not cause it?

If so, make a resolution to correct that eg. I will never overlap wheels again, or I will learn to ride is a bunch correctly.

Borrow or get your Ruby and go for a ride by yourself in a safe place. How does it feel? Do your good cycling feelings return? Maybe give it a few goes.

If you then truely feel, I don't want to do this anymore, OK. But give yourself a chance.