Of course I realize my mistake and I feel utterly horrible for having done what I did but this reaction of his, it just tells me that he hates me now.
It was stupid right?
No, I don't think it was stupid. It shows that you care for him and his father. We're all humans, we care for one another, especially those we know and we had something special with. Just give him time, he's going through a rough patch in his life, and doesn't know how to handle the stress, so he's just lashing out. He seems like a very prideful guy and one that doesn't know how to express his feelings. He seems like the kind to bottle it all up until he flies off the handle. Wait a month or so more and if you really like him, you could message him saying sorry, and tell him your intentions (I'm not sure how he could misconstrue your intentions).
You cannot undo this action. The opinion owner is going to be notified and earn 7 XPER points.