My S12 started giving me attitude, after I had left the house.
I had a man-to-man talk with him, explained to him that though I do not live in the house with him, I am still his father and will always remain so. And I told him it's not ok for him to treat me like an enemy. I told him I was sorry for the situation, I understand it may not be what he wants, and maybe he is not even sure what to think sometimes. I empathized with all of that. I told him I knew it was a hard thing for him. Despite that, I told him, he still had to treat people with respect and that includes treating me with respect.
Maybe your S10 is ready for that kind of talk?
M 43 S14 S13 D11 D7 Divorce final: Jan 2009 Making it up as I go....