It's difficult to determine the exact meaning behind why a guy would delete a heart emoji ❤️ on Messenger without additional context. However, here are some possible explanations:
Accidental Deletion: It's possible that the guy accidentally deleted the heart emoji while typing or scrolling through the conversation. In this case, it may not hold any significance.
Change of Heart: The guy may have changed his mind about sending the heart emoji and decided to delete it. This could indicate that he's not as interested in the conversation or that he's feeling unsure about his feelings.
Misinterpretation: It's also possible that the receiver of the message misinterpreted the meaning behind the heart emoji, causing the guy to delete it out of fear of sending the wrong message.
Ultimately, without more context, it's hard to say exactly what the deletion of the heart emoji means. It's important to communicate openly and honestly with the person in question to avoid misunderstandings.