It is always polite to ask if your partner is available to text when you want to initiate a conversation. If they are in the middle of work or out with family or friends, it is not a good idea to engage them in lengthy discussions about life and love. Texting your partner during work hours might annoy them and drive them away from you. On the other hand, if your partner is busy but still reciprocates equally, do not take advantage of that and make it a habit. Respect their time and try to avoid long conversations unless it is completely unavoidable. Rather, you can stick to short and simple messages to let them know that you are thinking about them.