This was another game between my father and I, and the opening was the same. The midgame, however was very different. I pulled off a counterattack at the last minute.

nice one.

After 17...Bf5, perhaps 18.f4 and 19.Rf3 

 

Instead of 29.Bc3 to protect the d-pawn, perhaps 29.Rb4 and keep the White Bishop where it at and attck the f4-pawn. 

 

Perhaps 32.Rb4 or 32.Bc1 (if 32...Bxd4, then 33.Re7+) 

 

33.Bg4 may be the losing move as it wastes a tempo.  Perhaps 33.Rb4 and if 33...Qc2, then 34.Rf1 to protect the kingside.

Well played son. Don't expect to be so lucky next time.