Oh they sent him well wishes and all that when he went in for heart surgery, but they despised his politics. Dick Cheney could be a bigger friend to DJT if he wanted to be. But Cheney health prevents him.
The Bushes viewed Cheney as a long-time employee of whom they eventually tired.
Also none of the Bushes attended the Lee Atwater funeral in 1991. The President went sailing instead. Without Atwater, there may have never been a GHWB presidency.