No words will can really be said, I never lost a family member, but a couple buddies have gone into light as a result of bikes. One was very fast, the other took 30 yrs.
Please ride again, get his initials painted on your bike, and he comes with you on every ride. My buddies initials are on my beloved Connie, they ride with me always.
Stay positive, it sounds like he was doing exactly what he wanted to, being with you and riding.
Ride safe all,
Greg