crush advice?? idk haha :)

hey so this guy I have know him for about a year and we saw each other for out of school activity for two hours and week and we would partner up for it. I'm pretty sure he liked me because he would always smiles and laugh, make jokes and would always want to work with me, and he stared at me a lot. I asked for his number which he gave to me right before lockdown.

since then we have talked heaps, but he takes ages to respond, anywhere between 5 hours and six days!?! it's really annoying and he says he has bad internet and he doesn't use his phone much, which I already know is true. I'm not sure what to message him to keep conversations going or to start a conversation.. hey or hi seems boring, any suggestions or advice for texting?? :)