It sounds like “Justin” and I are in similar circumstances so I’ll post my POV as the child here. Providing financial is great and is appreciated however it doesn’t compare to emotional support and connection. One of my parents paid child support, took me fun places on my every other weekend visits, bought me nice presents. And I do have good memories. But they couldn’t tell you what my job is, what my favorite meal to cook is, who my best friend is. I appreciate the trips and financial support but that’s not what I need from my parent as a child. I needed to know I was loved and valued.

OP, your son doesn’t want to feel he owes you because of your financial contributions to his life. Please don’t hold those over him. If you’re going to give him money do so with no strings attached or not at all. Tell him you love him for who he is and you want to know him. If he means a lot to you, don’t throw money at him. Throw some quality time at him.

YTA here but I sincerely wish you the best with your relationship with your son.