He's odd and very very casual. For the reply about work I'd write "Same as ever"
And leave it at that.
Or not bother at all. I think in this instance I'd just not bother and see what happens. If he's genuinely interested, he'll text again as he'll want to to know why you haven't responded. In the same way you texted, when he hadn't been in touch.
He's so casual to garner any interest you'll need to be even less keen than he is.
It's become a game. Is it worth it though? You're not on the same page.
You want someone who will be more available and commit more readily than this, yes? Someone who is a genuine match.
So don't reply and see what happens... let us know! If he texts again, or not!
It's a test of his interest, look at it that way. If you don't hear back, you know.
If you do, then it's more game-playing by the looks of things. If he was so keen before he had sex, he may become keen again, once he thinks sex is off the cards again, because you've gone quiet.
It's all quite silly.
Not something I'd want in my 30s and beyond.
OP, do get yourself back on the dating apps if you can face it and find someone else to distract you. You really do deserve better. You sound like you're ready and willing to meet the right person. You've kissed a frog, but sometimes we have to, to get to the prince. Don't give up, there's someone out there that's right for you. Men like this make me so angry because they destabilise your self-worth if you let it. But don't. You're better than this silly game playing. Save your heart for someone who genuinely cares. He's out there somewhere.