Losing interest, testing me or should I believe him?

If I text him he will respond to my texts and usually will keep conversation going but he takes forever to reply these days..( before he used to text me everyday at least once to check on me if he was busy) now sometimes even a day passes & he barely initiate texting. I want to ask him if I'm bothering him.. but I am trying to be casual since we are now more like friends rather than romantically involved. Last time I didn't text him for 3 days and when I finally gave in & said hi he replied & we texted for few hours and he asked me why I didn't text him since the last time he called me 🤨 I want to have a conversation about it without it seeming like I'm asking more from him but i just want to know where he's at. The last time we talked he said he's been working & sleeping a lot lately & he just doesn't have energy sometimes but other times he'll say he took the day off & barely text me... which makes me think he really doesn't care anymore to reach out. Which is fine but I want to know... but not sure if I should get the memo and stop contacting him or ask him & move from there
Losing interest, testing me or should I believe him?
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