I have been hinting at him in as direct a fashion as I dare, but the boy is damnably slow to pick up subtext. I agree with Lucius that direct discussion of the matter is likely to go poorly with Our Lord, but I will try one last time to convey what I can.

It would help considerably if the boy were not less Slytherin than Minerva's left shoe

Sadly, he has the killer instinct of a wet grape -- his instinct is the shield, not the sword -- but several of his nearest and dearest have a bit more edge to them. I may be able to provide the nudge a little more indirectly.