Have a hummingbird feeder.
Or, learn to love the squirrels. I find them incredibly cute, but then I was never that interested in birds.
The American Grey Squirrel is very tough and adaptable. They were imported into Britain over a hundred years ago and some were released into parks, woodlands and forests where they quickly found their niche and multiplied rapidly in competition with the native European Red Squirrel. They have better digestive systems and are much more aggressive than the Red Squirrel which subsequently went into decline and now only survives in a few protected areas. They are considered vermin by some who refer to them as 'tree rats'.
Their meat is edible and this may have been the reason they were imported from America.