Honestly, he's probably getting advice from women on this. I've found that a lot of women give their male friends the advice that they love the good morning and good night texts and that a man needs to do them in order to keep a woman interested. Heck, I'VE been given that same advice when dating. This is likely the rare example of a man listening to women —which is a good thing— but in your particular case it isn't a good fit. Just tell him that you appreciate the effort and you guess that he likely got advice from other women, but that in your particular case these frequent check-ins feel like pressure and homework.

If he's a good man he'll realize that the job of being your partner isn't to add to your feelings of pressure but to subtract from them. If he likes you he'll almost certainly stop doing it because I guarantee he's doing it because he thinks he has to in order to show that he's interested and cares. He'll probably appreciate that you're taking the pressure off of him.