Guys: Is it a sign if he opens my texts and snaps but doesn't respond?

so I like this guy, and I have his number, have his snap, all that stuff. he'll give me some signs that make it seem like he could have a slight interest in me when we see each other, like staring at me, a lot of open body language, etc. He looks at my stories, but when I send him messages or snaps, he'll open them and not respond. He used to respond almost immediately, but now he just doesn't at all. Is it a sign that he's losing interest or never even had an interest in me in the first place?
Guys: Is it a sign if he opens my texts and snaps but doesn't respond?
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