Why did black slaves mix with whites across Latin America, but in North America...?

First of all, African Americans do have a lot of White Blood, but my guess most of that sadly has to do more with rather than marriage. My guess is that this country has always had the vast majority of its population be white that inter-racial marriage has never really gained as much momentum as in Latin America. This could be due to the genocidal policies of the British to create an American England for its lower cles rather than going the more traditional route of enslaving and subjugating the indigenous population. Subsequently we had to use African slave labor, but it was used to a much lesser extent than other countries in the Americas.