There is a boy I like who always says I can't get married.

That depends on what kind of person that boy is. I think he is making fun of you in good faith. Maybe he wants to be close to you, too, because he always talks to you about whether to get married or not. Maybe he wants to hear you jokingly say: Will you marry me if you can't get married? Give an ambiguous answer like this, and then move on.

Or, he is also interested in you, but because he is a flower.

So I didn't feel too embarrassed to tell you directly. You said you implicitly expressed your white to him. I think as long as you are not a bad girl, he is glad that you like him, because, to put it bluntly, there is still a way out. But ... I'm also confused. Think for yourself. Forget it.