Is this sketchy?

I’ve been seeing this guy for a few months. I haven’t seen him in a few weeks because (truthfully) he has a lot of really important exams to study for, which is understandable. However, even since we started talking he’d take hours (like 8+) sometimes to text back, and if I say goodnight he replies right away with either a conversation starter or says goodnight back. Lately it’s been more of the latter, as he’s apparently studying but he goes on social media in the hours that we don’t talk. I don’t mind not talking for a while, and i don’t need constant texting but sometimes it bothers me that he doesn’t answer unless i text him sometimes. I don't know if it’s wrong to feel like that. In person though he’s always been fine, so i’m really not sure.
Is this sketchy?
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