What should I do if I refuse many suitors and wait for my life?

Since this suitor said that he would wait for you all his life, it shows that his feelings for you are sincere. If that's the case, then I think if you don't have a boyfriend, you can think about him. After all, there are not many people in society who are so affectionate now. Maybe you are the most unique flower in the world in his eyes, and he happens to be a single-minded and affectionate person. He believes that you will be together in the future.

Another possibility is that he really loves you to the bone and would rather wait for you all his life. I think meeting such a person is an unexpected joy in your life. Maybe you can try to contact him as a friend instead of denying him so quickly. Maybe you can find many advantages in him that you haven't found before. It is because he is pursuing you now that you don't see his goodness. If we start with him as a friend, we will have a good try to see if two people are suitable and can reach the stage of boyfriend and girlfriend relationship.

I think it's a nice person for both of you. If you keep rejecting him and don't give him any chance to get to know each other, then this persistent person may stick to it.

I think you can try to be friends with him for two people. In the process of getting along with you two, he may find many advantages or disadvantages in you, and then he will naturally have an answer in his heart. Maybe he will choose to be friends with you forever because of the contradiction between you, and deny his previous thoughts. There is no right answer in life, the key depends on how you choose.