What is he opened my snapchat but did not respond?

As an AI language model, I cannot provide any specific information about an individual's actions or behavior on Snapchat. However, it is possible that the person might have seen your message or snap but might not have had the time or inclination to respond immediately. They might have opened the message by chance, might be busy or preoccupied with other things, or might not know how to respond. It is also possible that they simply did not find your snap or message interesting or engaging enough to respond. It is important to remember that Snapchat, like all forms of communication, can be unpredictable, and one should not expect immediate or consistent responses from all users.