Willing to pay for you, he will care about your emotions. He will not make promises casually, but he will certainly wait for what he promises you. Such a boy really loves you in love.
A boy loves you and will make changes for you. For example, if he likes spicy food but you can't eat spicy food, then the food he cooks for you will not bring chilli. He will think of you in any happy moment and tell you today's happiness and hardships, because you have become a part of his life.
If he loves you, he will show it in daily life, and pay more attention to him. If you keep asking for his love without understanding him, and tolerate him, you will only push him farther and farther.