I choose Blackmar-diemer gambit (i like it so much) and randomize versus a friend, but isnt look like

1. d4 d5

2. e4 dxe4

3. Nc3 or f3   :( 

 

the dxe isnt captured   

I mean, when the game starts, will be the turn for the black side, and accep or decline the gambit, but in this case, dxe is part of the gambit, i dont like 

 

am I wrong? 

 

If Black declines, you play e5 gaining space. You gain a simple advantage in that line of play.