I played this game just today.  Im not really familiar with the king's gambit so I may have made a number of positional mistakes.  Can you please analyse and comment on my game, telling me what I did wrong, what I did good on, and what I need to improve on? 

Thanks, your help is greatly appreciated.

Your start wasn't very good:P

3... exf4 bad decision, leaving him in control of the middle.

At 8. Bxf4 you can see how he's controling the middle and you havn't even started to use your queen's side pieces

Later on your king is on a one man mission, doing all the job since you didnt open up for your queen's side pieces earlier:P

After giving away a free knight instead of rook for a bishop you're in advantage

Since you played exf4 anyway, you may as well have done it immediately, i.e. King's Gambit Accepted.  White had a big advantage after 6.d4 and should have played 13.Bg5 winning.