When my boyfriend learned that I was unwell, he only sent a short message saying "Be careful". Is it because he doesn't care enough about me?

Men and women are equal. Maybe he is very tired and sleepy at the end of the day, so when he is half fresh, he speaks very briefly. Maybe most people have stomachache, so he may be very harmonious. Besides, you should take care of yourself. Abdominal pain, a mild disease, should be paid attention to at ordinary times and will not last for a while. You must learn to love yourself, so that you can love others.