QUEEN sac, KNIGHT checkmate

Hi this is a special game for me on valentine's day  In chess.com tactics trainer helps me a lot while playing games. Because of the practice with tactics I sacr'd Queen to win the game This is a bullet game(1 min)...Let see the match...

My opponent striked my Q with his rook and so I got checkmate with my Knight.. If he strikes my Q with his king ....... then game turns against me .. I am a bit lucky..