Is it normal for a guy to

to admit he has feelings for you, but to take at least a day or a few days to reply?
I've been speaking to this guy on Discord for a while who I really like, and I've been crushing on him for a while though didn't say anything. He always acts so friendly to me, always using exclamation marks and emojis, and often compliments me, especially when I showed him photos (he called me cute, pretty, beautiful, sexy and hottie) and is often very flirty in a playful way, but not in a particularly obnoxious or vulgar way; by that I mean he has never made me feel uncomfortable, or pressured into doing something I don't want, and he seems to respect me.
Well about a week ago, we video chatted, which he was eager about doing, and it was then that he confessed that he had feelings for me, as did I. And our conversation turned into a flirty one, a romantic albeit a little sexually charged, cute conversation. He said he looked forward to video chatting again soon. And said he really meant it when he said he is falling in love with me. Also it was easy to read his body language on the video camera, like I got the impression he was very fond of me, and maybe a little nervous, and he even made a kiss at me which was cute.
The only problem is that responses are delayed. Usually he takes at least a day to respond, though occasionally he talks on the same day if we're both online at the same time, which has only happened twice. But now he hasn't replied for about 4 days. I don't want to bother him in case that scares him off or annoys him. I mean he could be busy with studies cause when I chatted to him it looked like he was in some kind of classroom with a whiteboard in the background. But I just worried that it's not normal. I wonder whether he really does like me or not. We're not going out or anything (yet) but it's hard to get to know him properly when our messages are so delayed. This is also the first time I've ever spoken to somebody I actually like in that way, so this is all new and exciting and confusing for me. So is it normal? Or am I just overthinking and worrying too much?
Edit: I should also mention we live in different countries. Which means it's hard to be online at the same time.