Ooh that's a nasty fall, I remember my friend broke her femur a few yrs back, she got the cast on at the start of the summer and got it of just in-time for school!
This is going to be a hard decision, not nice when your considering selling because of a fall. Would you consider loaning him out for a year to an experienced rider, that way you know any little bad habits could be worked out of him and it gives you a chance to recover... in saying that if he's getting worked he could just end up fitter and stronger... your just going to have to weigh up the pros and cons of your horse.. do you want to ride him again after what happened? Would you feel comfortable getting on him?
I know when I had a bad fall of my mare flo when I was jumping her it recked my confidence for a good while, I stuck to one of my quieter horses for the rest of the summer and it really helped me get back into it.
Good luck whatever you decide