What did i miss?

No reason to give your opponent the c and b pawns on the 29th and thirtieth move? That didn't make sense to me.

I'll never be able to explain that :-/ 

But it was a nice win with a pawn sacrifice at the beginning

18...Rxd3+ (Mate in 6)

49...Kd4 50.b7 Bxb7+ 51.Kb6 Be4

71...Qc6 72.Kd4 Kf3 73.Ke5 g4

77...Qf5+ 78.Kc6 Qgc5+ 79.Kb7 Qfc8#

78...Qg5+ 79.Ke4 Qdd5#

79...Qd7 80.Kg6 Qg5#

80...Qa7 81.Kh6 Qfa6#

I'm surprised i missed 49...Kd4, even in my analysis. Thanks.

"29...b4 and 30...c3 were really bad moves for Black. Maybe you can make something out of those connected pawns now."

I'm starting to get embarrassed about that. Only justification for either move that i can think of would be if i had moved the rook on the back rank to attack the B pawn or defend my C pawn. I remember thinking at the time "wtf did i do that for?" but i don't remember thinking, "lol, forgot to move the Rook". I'm baffled by it.

Yeah, if you want to move the c pawn, plonk it on c4. Then it becomes a very good opening move  (best one imo ;) ) 1. c3, although a recognised opening,  should only be attempted if you really know what you're doing for the next 8-10 moves, simply because it blocks the knight, assumes you want to open a channel for the queen, and doesn't really make much of a claim for the center.

I liked his opening move very much though i didn't counter it well. I played e5 and he responded with d4. instead of defending my e5 pawn with d6 should i maybe have played d5?

Then if he takes e5 my Knight goes to c6 to attack it, his knight comes out to f3 to defend and i push bishop to g6 to move or take his knight creating doubled pawns and then taking his e5 pawn anyway. 

I f'kin hate this game! http://www.chess.com/livechess/game.html?id=166310199

Yes, 7... Bb7 had long-term goals

One of my old favorites: Bird's Variation--just bad enough to be good.  The klunker was a6. You chased the Bishop to an attacking square. After the exchange of Knights on d4, the poor Bishop on b5 looks kind of lost. Nudging it back to a good diagonal is a bad idea.

Important is the quick development of the King's Bishop to c5 and the Knight to e7. The position is a bit shaky, but you may live to start a King-side attack.

.24 knxd3 wins a rook with a discovered check if the pawn recaptures gme over

2. ... e5 was a mistake, since your d pawn is pinned.
3. ...Nf6 is a mistake, since your e pawn is double attacked, costing you a pawn.
5. ... Good job trading queens. Lucky for you White blundered and took the pawn before trading on you.
12. White is doing a terrible job of developing. First making the unnecessary ke1, now blocking both bishops with knights.
18. I see you are aware of you blunder here. Good job though opening the e file and bringing out the rooks. I actually missed that and at first thought it was bad to trade a bishop for a knight.
19. True, you win a pawn, though i would have played Bf1 and gone for that pawn instead. The bishop on g2 would then guad your c6 knight, and could give check on e4.
24. I prefer Nxe3, winning a pawn and giving check, and double guarding your bishop. Follow it wiht Re2+ and take the b pawn next.
26. Now that e pawn is guarded.
36. I would have double rooked the e pawn here. Even pile up on the g pawn. Those two passed pawns can become dangerous, though.
46... Bb7, Ke4, Kxe3, Kxg3, f4. White needs 7 moves to make a queen. You need 9. So actually your king must help your bishop. Actually, Kxe3, f5, gxf5, gxf5 is faster. Both get queens, you try to force a trade, then go for your last promotion.
47. Excellent move, better than what I saw. You slowed White down plenty.
51. Queening on f1 or g1 appear just as good. I would have taken the pawn.
59. White blundered. Lucky you.
63. Good move white.
66. And a mop up.

Fantastic. I missed that. No queen battle. The white pawns are stopped, and the black pawns break through on their own. Though White would not play b7 until after Ka6.

22. White should have played f3 followed by Kf2.