What is he never texts me first but always replies?

There can be various reasons why someone never texts first but always replies when a message is initiated by someone else. It might be possible that the person is not comfortable initiating a conversation or feels shy to start a conversation. They might also be busy and not able to think about texting first. Alternatively, the person might not want to appear too eager or available, and hence, waits for someone else to initiate communication. Whatever the reason may be, the fact that the person is always responding to messages means that they are interested in the conversation and willing to engage. It is important to communicate openly and understand each other's communication styles to avoid any misunderstandings.