What are the reasons a guy still texts me after first date, but hasn't suggested second date?

Anonymous

What are reasons why a guy still texts me after first date, but hasn't suggested second date?

He said he had a good time with me when I thanked him after getting home from first date.

For the 2 days after first date, he texted me in the morning asking about my plans for the weekend, but didn't reply until at least a whole day had passed.

Before first date he would get online (WhatsApp) within minutes or as soon as I texted him, and would reply within minutes or right away, before I finished replying to his texts.

He has complimented on me in texts after first date, so I would say that if he wasn't interested in me, he wouldn't be doing that, right?

But the frequency and timing of his texts have changed after first date. Now he replies at least after a whole day had passed, and he would say that he's just reading my texts after 6 it 7 in the evening.

I'm okay if a guy is busy and doesn't reply right away, but his texting behaviors only changed after first date, but it doesn't seem that he's completely uninterested, either.

Is he keeping me as a backup?

Updates
27 d
I asked this question because I know my value and I know what I deserve. I don't want to waste time on a guy who's keeping me as a backup. I don't know if pre first date was his baseline or this is his baseline texting, but I want someone who values me and doesn't waste my time.
What are the reasons a guy still texts me after first date, but hasn't suggested second date?
6 Opinion