why oh why the d5, i believe that up to that point you were in a strong position especially since he couldnt castle anymore.
I think you need to look after the pawns more and think more how you play them.
Complete destruction
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d5 is book. Not necessarily a good book, but book nonetheless...
The problem with the planned Ba6 is that it's too slow. White obviously wants to connect his rook and queen, and once he chases your queen away, Ba6+ would just gain him yet another tempo.
an early g5 is the key to winning the king's gambit as Black...
I was playing Black here against the King's Gambit: