Jackson,
To give any opening a fair shot, you've got to give it some study and more than one game. Although from what I understand, the c3 Colle isn't looked well upon by people of higher rating.
I have a question about your game. Why 15. g3? Why not bxc6? That would have opened up bxe5 or Nxe5 putting alot of pressure on his castled king.
One other thing, the e4 push and the subsequent support of e4 by the knight on d2 is an important aspect of the c3 colle. It frees up the dark bishop for the kingside attack. Moving your bishop to b2 is a Zukertort move and is better developed with b3 as opposed to c3.
If you want a better understanding of how to play the c3 Colle, I'd suggest picking up Oleinikov's e-book.