Is it fair of my friend to react if I take time to reply to his trivial texts?

We've been friends for a few months. He lives with his family and has a lot of free time. So he keeps on texting me all day and these texts mostly consist gossips though I have told him already that gossips don't make much sense to me. The day before yesterday he sent some similar messages gossiping about someone and I didn't reply for 12 hours or so. He then deleted the messages and said "I hate people who take time to reply. You're online but you're not checking my messages. I hate you." This happened a few times earlier too and I clearly stated many times that I'm not one of those people who reply quickly.

I'm an introvert and too much social interaction drains me. Besides, I'm a university student living alone. So I have to spend 6 hours at class. After class I have to study and attend a foreign language course. Though I don't cook, I have to clean my room, do dishes, laundry and grocery shopping. Besides, I also give some time voice and video calling my family and long distance partner. The little time I've for myself, I'd rather spend it on watching something than gossiping about people.

Is it fair of him or am I the bad person?

Is it fair of my friend to react if I take time to reply to his trivial texts?
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