You sound like you are being way too hard on yourself. I obviously don't know this guy but the way you talked about his last relationship it sounds like he may just be looking for the action.

I think you were smart to slow things down. See if he is interested in you for more than sex. If he isn't, then it is no big loss because he needs to grow up and you don't need that kind of baggage.

And as a guy who has been on the receiving end of phone calls or texts after a major relationship discussion - don't keep sending them it comes across as needy. Don't give him that satisfaction, stay strong and know that if he is worth it, he will call or text . . . if he doesn't - go find a better guy.