Being distant?

So my boyfriend works nights and usually wakes up around 4pm. We hardly talk on days he works because I go to sleep at a normal hour. We have about normally an hour to text before he walks into work.

Lately, he has been waiting until right before he walks into work to text me... and I know he’s not asleep passed 4 because that’s when he starts being active (online) on Instagram.

He wasn’t doing this before. But I wonder if it’s because I’m too available for him? I reply to his texts in a timely manner all the time, he takes hours most of the time. And I am the one usually being mushy and sweet.

Should I back off and give him as much as he is giving me?

I’m not a teenager btw