Is he interested?

So I have been messaging this guy for two weeks now ( he is 28 and I'm soon to be 26). I sent me a friend request on facebook, I accepted and then he started to text me. He was since the beginning not the fastest to answer my texts, sometimes he could answer within a few minutes and sometimes it could go 2-4 hours, I was totally fine with that. He asks questions and seems to want to get to know me. But these last few days he answers less frequently like every 10 hours and today he has not answered my text for 24 hours. I don't understand because he keeps asking questions but is not answering me. What does it mean? Is he even interested? I feel like i want to ask him why he replies so slowly but i'm not his mother. Also we been texting two weeks but have never met IRL.

Is he interested?
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