I think you need to go to a counselor and see why you are so needy and better ways to get your needs met than deciding to glomp onto some guy and get confused between a date and an offer of marriage. One can't get to know another person in just one session; it can feel like we've known something forever but that's not the same as actually having done so.

If you all were sort of planning to go out Saturday, or that's the only day you had available and you really wanted to push that; why did you not make the plan at the beginning, when he asked about your availability? Leaving it to more back and forth with text and email just leaves open the probability of something getting in the way. I would have said something like, "I already have something going on on Friday but would love to try that new restaurant everyone's talking about on 10th street; would you come pick me up around 6:00?" Then, with the reservation/date set, I'd leave it alone until then and pick up where one left off on the last date during this next one. You could do all your imagining of what it will be like, what you would like it to be like, and anticipation until then.