I feel for you OP, it did aound like he went pretty cold afterwards.
I get why people want to wait to have sex, but if you want to have sex with someone, I wouldn't try and stick to a certain number of dates-just do it when you want to and are ready-, no date, first date, whatever. Arseholes will still be arseholes after 1, 3 or 100 dates.
You find out pretty quickly if you sexually compatible, how they behave after and if earlier on, with less emotional attachment to it. I've been married 20 years, so not saying this from a place of serial one night stands either; and obviously only if you want to have sex.
The not texting wouldnt be a big deal for me, but the coldness would be.
You can and will do better :)