Why does my lover sometimes reply with a "yes" every time I send a message?

If your lover only replies with a "yes" or "yes" message, this may mean the following:

He is very busy: your lover may be busy with other things, unable to reply to your message immediately or having no time to reply to your message in more detail.

He doesn't know how to respond: sometimes, when a person doesn't know how to respond to a message, he may simply answer some basic answers to avoid embarrassing or awkward pauses.

His interest is not high enough: maybe your lover is just temporarily bored or not interested in your question or content, so he only replies with a simple answer.

If you want to communicate better, I suggest you take the time to talk with your lover about your feelings and thoughts. Tell him that you want him to reply with more detailed information, so that you can experience better communication and interaction. If your lover can't reply to detailed messages for other reasons, you can openly discuss these problems and find solutions together. Good communication and solutions can help you build a better relationship and interaction model.