If your husband is making a Big Deal out of it because he'd feel more secure if you didn't ride, now that he's seen what can happen, I'd use exactly the car analogy above. Just say hey, it happened, it was a random bit of bad luck (no one's fault), there's no permanent disability and life will go on as before. Say that to yourself also until you believe it.
VERY importantly, even while your collarbone heals I'd keep up your routine of going to the barn as others have said. Walk your horse around, hand-graze, groom one-handed if you can, or failing that just go and talk, watch, and hang out. I'm not sure reading or hearing dozens of Wreck of the Century stories is really a good idea--that just may stoke the fires of fear and provide justification for avoidance that you may subconsciously be seeking. You have to be honest with yourself to avoid being pulled in directions not your own due to other people's pressures.
If riding is TRULY a part of your life you can't imagine living without, you'll get back on (and you'll want to!) when your shoulder is healed. If, on the other hand, you have different priorities in what sounds like a demanding life right now, that would be fine too. Just don't deceive yourself in either case.
Best of luck!