We have already answered a similar question: http://bibblansvarar.se/en/svar/british-french-7-years-war
Britain was on the winning side of the conflict and could therefore dictate the peace agreement. France and Spain lost parts of their American colonies to the British. The Seven Years War could be considered to be the starting point of the War of Independence.
Here is another link to an american educational organisation:
Here is a page at the US State Department website:
Links to articles at the BBC website: