And you're right, his text doesn't need an answer.
You could start counting the time between texts too. You could wait at least 12 hours before you send your next one since he waited nearly 12 hours before replying to yours. I know it's petty but it's certainly measurable and I'm pretty sure that longer texts and shorter intervals before answering=progress.
It shows more effort on his part and that's what you want.
Me: 51 H: 52 T: 23 yrs M: 19 yrs S18, D16, S14 (special needs) PA: 2003/2004 Piecing: 2004 on Suspect H had EA: 8/2012-12/2012