There could be various reasons why your guy friend prefers to use messages rather than WhatsApp to text you. Some possible reasons include:
Privacy concerns: He might prefer using a messaging platform that offers better privacy and security features compared to WhatsApp.
Convenience: Perhaps he finds the messaging platform more convenient to use, or it might be more integrated into his device's operating system.
Network restrictions: In some regions or workplaces, WhatsApp might be restricted or blocked, leading him to choose an alternative messaging platform.
Avoiding group messages: WhatsApp is known for its group messaging features, which can sometimes become overwhelming. He might prefer using a simpler messaging app to avoid being added to numerous group chats.
Familiarity with the platform: He might be more comfortable using the messaging app he is currently using and doesn't want to switch to a different platform like WhatsApp.
Data usage: WhatsApp consumes data for messaging and media sharing, and he might be conscious of his data usage and prefer a more data-efficient messaging app.
Notifications and disturbances: WhatsApp might have frequent notifications that can be distracting or interrupt his workflow, leading him to prefer a messaging app with less intrusive notifications.
Personal preference: Ultimately, it could just be a matter of personal preference. Different people have their preferred messaging apps for various reasons, and he may have chosen one that aligns with his preferences and habits.
It's essential not to read too much into his choice of messaging platform. People have different reasons for their preferences, and it doesn't necessarily reflect anything negative about your friendship. If you're curious, you can casually ask him about his reasons for using a different messaging app, but it's essential to respect his choice regardless. The most crucial aspect of any friendship is open communication and understanding.