How Can I Let My Cat Know That I Really Mean It?

I have been deeply fond of animals since I was a child, but I don't know why these animals always don't want to be around me. But I am very satisfied because they come to play with me often. The love in their eyes cannot be concealed. One day, I picked up an injured little black cat. It was wet and covered with injuries. It is all black except for its paws and neck. I adopted it. From then on, I started to pick up all kinds of small animals one after another. But only this black cat refused to get close to me. Although it occasionally acted coquettishly, its eyes were always full of hidden resistance. It obviously likes me too. How do I let my cat know that I won't throw it away. Purpose: There is no shortage of gentle people in the world