What would you do if someone took 6 hours to text back?

So I made a friend and we have been talking. The problem is he take hours to reply. I don't care why he takes long to reply, but why message in the first place if you're gonna do that. So we were having a convo today and he replies to my text after 6 hours. I haven't opened it yet but what should I do now so it doesn't seem like I'm the b**ch who cut him off but liek still wanna be friends. Do I:

1. Send a meme about how he takes forever to respond (but won't he think I'm obssessed?)
2. Leave him on read
3. Leave him in delivered forever

Please help and Thanks!!
What would you do if someone took 6 hours to text back?
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