Hi, I play High school football in Canada!
Cool!  I don't know anything about Canadian football. Is it different from American football?
A bit! In the CFL, the field is longer and the end zones are a bit deeper, but other then that not much!
Has Canadian football been around for as long as US football?
Comparison of American and Canadian football
American and Canadian football are gridiron codes of football that are very similar. Both have their origins in rugby football. There are, however, some key differences.
History.
Rugby football was introduced to North America in Canada by the British Army garrison in Montreal, Quebec, which played a series of games with McGill University. In 1874, the U.S. Harvard University hosted Canada's McGill University to play the new game derived from rugby football in a home-and-home series
was surpassed by Anthony Calvillo in 2011, both of whose careers were exclusively in the CFL.
Differences.
There are several important specific differences between the Canadian and American versions of the game of football:
Differences Playing area.
The official playing field in Canadian football is larger than the American, and similar to American fields prior to 1912. The Canadian field of play is , rather than as in American football. Since 1986 Canadian end zones are 10 yards deeper than American football, being . 
The end zones