unlucky man. He didnt really win. You lost.
A word of advise. If mates on the prowl, block it off in more ways then one.
Excuse my horrid spelling of prowl
Utter Embarassment
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8 Qxd4 Bxe5 9 Qxe5+ wins 4 white. However you could/should have won
19. ... Nc5 instead would have won you a piece!! but I guess that you know already.
no, he definitely lost 
19... Qd4 and you just might be winning.
My solemn and respectful advice (because we are all learners here) would be not to get over excited when you feel that victory is within your grasp. Yes I played like a plant pot but you blew it. It won't be the last time. There's nothing to be embarrassed about. Peace and Love
Just a quick glance from what I saw in the game. I did this kind of quick since I'm on a break from work at the moment so hopefully the numbers are not mixed up 
4. … Bd6 loses to 5. Qxd4
I don’t like 8. … O-O due to Bxf6 gives White a slight advantage
9. … c6 (probably d6 was better)
10. … b5 (again d6 was called for) get that Bishop developed
14. … d5 (Instead Nxe4)
15. … Nxe4 (Black is winning)
19. … Nd4 (Nc5 would have kept Black’s advantage as already mentioned)
This is a game I played a couple weeks ago in a tournament. Despite some errors in the opening and a threatened mate by white, I feel like I had a reasonably good attack going in the middlegame. However, the game ended abruptly when I forgot that my knight was preventing mate and moved it towards the center, whereupon I was immediately checkmated. Oops.
Any thoughts you can give me about how this game might have gone if I HAD noticed the blunder would be greatly appreciated.