FFS all this don't text, play it all coy bullshit gets really boring after a while, not to mention how anachronistic it seems in modern society.
The OP hasn't done anything wrong. She's got an answer, which she wouldn't have had otherwise. He wasn't rude, a bit inept because he really should have made it clear post-date that he wasn't interested, didn't feel a spark, etc, that's simple good manners. However he is a man doing OD, and if he's like the vast majority that means he will be a bit lacking in social skills and courtesy. Or be just out for a shag. That covers about 99% of them. So he's probably no loss.
And the reality is, he wasn't interested from the second that date finished. The OP didn't change the course of destiny by texting him. Nor would she have if she hadn't text him. The outcome would have been identical - but this way she has an answer, which a lot of people, me included, would prefer.
Personally, if I want to text someone I do. I don't view it as chasing, or that there's anything hand-wringingly wrong in it. I'm not a shrinking violet, and the sort of man who likes me, and who I like, isn't one who makes prissy pathetic judgments about women based on whether they double-text or not. It's not as simple as 'if a man's interested they'll chase you', I can think of several instances from my own experience, and that of my friends, where that wasn't the case.
At the end of the day, do you think a man ever bothers, ever worries about when to text or not? Or to send another text without reply if the first received a non-commital response? Of course they don't! Case in point: I was asked on a date 15 months ago. I cancelled last minute. We kept in contact for a few weeks thereafter with a view to rearranging, but ultimately I decided I didn't want to. He continued to text and phone me once a week, I didn't reply, or answer after the first couple. He gave up texting after about 6 months, but he still calls me once a month. I don't answer because I have nothing to say to him. He clearly still wants to meet me - and I bet has wasted precisely zero seconds worrying about putting me off, or ruining his chances. Whilst I wouldn't advocate anyone prolonging contact to that extreme (!), by the same token I do think as women we should worry less about all this, not blame ourselves (or let others blame us) every time it doesn't work out and just do what feels right, fuck all this rules-y, game-playing cobblers. Because ultimately with the right person you can't get it wrong :)