My father is dying

I’m not sure how I feel about this. I’m going to miss the man, but he wasn’t and still isn’t, very nice to me. He’s not been very present in my life, and thinks that if he throws enough money at therapy and drugs that our relationship will get better. I disagree, but don’t really have a voice. My father was a military man, and from money, and thinks he runs everything. I called him today a bit earlier than I should’ve and when I realized this, hung up, as per his wishes, asking him to please call me when he has time. He texted me back and we spoke for a moment, the conversation ending with, “leave me alone, I’ll let you know when I have time for you”; making me wonder why he bothered saying anything in the first place. I mostly just feel bad for the guy, but he doesn’t make it very easy to be a good son either.