Just wanted to get some thoughts as to where i went wrong here.  Thanks in advance.

I prefer the 6. bc4 variation as it attacks the f-pawn.

Of course, the knight move lost you a tempi and shouldn't of been done - developing the other knight was probably better.

After 17. ...Qe7, I don't think white loses a peice. Rd7 was playable. Also note that the white queen is aimed right at the b pawn, and ultimately, the rook.

[edit - I'm blind, nothing to see here! ]

 Doh, completely right.  I missed that Rd2 isn't any problem after c3

d2, my bad...wrong side of the board.

Anyhow, you can just take the c3 pawn with the queen and still been perfectly safe.

Well a cursory glance makes me scratch my head at move 7. Nf3? Why retreat? Nc3 Be2 make more sense. Move 8. Bf4, again the moves before make more sense! I wont even comment on the rest of the game  ;-(

21 rxq nxq,rxc5=?

As mentioned 7.Nf3 is bad. Now Black doesn't have to play ...Nd7 just to kick the knight at all. ...BxN early on would simply create a symmetrical endgame and you would have the bishop pair.

I like 8.Be3 better. d4 is going to get hammered so protect it. d4-d5 is something you want to play when you have no other choice. So make Black work for it.

I don't like 12.b3?. There isn't anything dangerous right now but your king is in the center. 12.Be2 seems better. After 12.b2-b3, b2 isn't a target, but c3 and a1 still are so the move actually doesn't do much. At worst, you lose only the b-pawn and can bail out the rook. Now the knight and rook start to sweat.  

The immediate threat was 12...exd5 taking the e-file. The king being there is a plus. This had to be something to look at since it's a threatened capture.

13.Rd1 looks dangrous. One idea for Black is d4 follwed by c5 with a dangerous passed pawn. Maybe 13.c5 was better? Either way, things get very sharp and your king is still in the center. Notice how the move 12.b3 gives Black time to create more threats and you are forced to answer them. Every turn you are defending is a turn your king is not safe. By attacking you, you can't get setup, and if you can't get setup then you could be in danger of some tactical KO.

14...d4 looks good as well. The bishop is not bad. There is still a serious grip on the e5 square. A knight will be very annoying there. 

15...c5 looks like a blunder.

15...Qe7 16.Rd2 d4! 17.Qxd4 Nc6 and Black is finished with his development. He has the initiative.

After 16.Rd2 White can safely castle, but Black looks good.

After 20...N6d7 raps things up. 

12.b3 looks like the move that caused all that trouble. Don't forget simple things like developing and king safety.

cool

12 b3 looks like a "wrong un", call me a maniac but I prefer 12 0-0-0, when White's pieces have a certain coordination, also White's King escapes the centre to relative safety with initiative.

A variation:

12. 0-0-0 Bxc3  13. Qxc3 exd5  14. Bh6