There are situations when I do not understand my boyfriend. Now we are at a distance, and we have a lot of misunderstandings, but when he returns from business trips, everything is fine. But it does not manifest itself in jealousy, for example. And this confuses me a bit. What do you think is going on?

I think that when you communicate at a distance, he doesn't feel important. Show a little more attentiveness and empathy to him when you are away, and see the result. I also recommend you to read these tips https://worldofarticle.com/feel-special/ they also contribute to maintaining a good long distance relationship. Personally tested, the tips from the article work, but you need to use them gradually so as not to make the opposite effect.