My husband and I have a good relationship, but why don't he call me or send me text messages when he is on a business trip, and I always send him text messages?

Because you send it to him every time, it has become a habit. He is used to waiting for you to send it, so he doesn't take the initiative, and you are used to sending it to him, so you can't help but let him send it to you. This is the established way of love between you. If you want to change this way, you can only try not to send it to him and let him. If he doesn't send it, you should tell him that you want him to send it to you on his own initiative and tell him what you really think, so that he will know how to do it. Husband and wife must communicate, only communication can solve the problem, don't think "he loves me and should know", so you will only torture yourself, and men are not omnipotent. Sometimes you need to mention some ways of love to let him know what you need and how to love you. May you live happily all your lives!