I'm pretty socially out of practice/anxious but what is going on here

Her: hey

Me: hey, how r U?

Her: I'm fine, and you?

Me: I'm alright :) just Tryna do a lecture, hbu?

Her: I'm fine

Me: what you up to?

Her: nothing just chilling

Me: true, alright have a good afternoon

Read, no response

Me 15 mins later: U got any interests, things U like?

Me: I didn't realise I could like not respond immediately if I need to do something 🤣

Read, no response

20 mins later: Reddit post