First of all, it's important to be clear that everyone expresses themselves differently, and sometimes people express their emotions differently. Therefore, you can't conclude that your boyfriend's feelings for you have changed just because he just sends him a happy holiday.
However, if you feel that this behavior makes you feel uncomfortable or confused, you can try to communicate with your boyfriend. You can express your feelings and ask him why he only sent this sentence. Maybe he has his own reasons or ideas and needs to communicate to understand each other better.
When communicating, pay attention to the tone and style of communication to avoid causing unnecessary arguments or hurting each other's feelings. You can ask questions in a relaxed, natural way, such as: "Honey, I'm feeling a little confused. Why did you only say happy on the holiday?Is there any particular reason?”
If your boyfriend is upset or uncomfortable with your expression, you can try to respond in a more positive, understanding way. For example: "Honey, I'm not trying to accuse you or ask you to change anything. I just want to better understand your thoughts and feelings. We can work together to make our relationship better. ”
In addition, you can't evaluate your boyfriend's feelings for you based on your holiday performance alone, you need to combine what he usually says and does!
If he is usually considerate and caring for you, giving you what you like, finding ways to do everything he can for you, loving you and caring for you. Then, a happy holiday on this day may really just be that he is not good at expressing himself or does not understand romance.
However, if he is also lukewarm to you and rarely cares about and takes into account your feelings. Well, it means that he really doesn't love you enough. You can decide for yourself whether you need to break up or not.
Finally, remember that communication is the key to problem solving. Only through honest and frank communication can we better understand each other's thoughts and feelings, which can lead to a healthier and more stable relationship.