We broke up. I called him to answer, and I sent him a message to answer. Does he still love me? He's the one who broke up. He's heartless,

Since we broke up, that means he doesn't like you. If he likes you, he won't break up with you. As for you, he answered the phone and returned the message, because he held the idea that love can't be friendship, and there is no need to treat you as a passerby. But just because he did that doesn't mean he loves you. Have a good time.