I personally know of four couples that went out again and are married for years already with kids. The reasons they gave that it did not work the first time they went out was inexperience in dating(not realizing they had the one meant for them), cold feet,were not truly ready to go out yet the first time around.
While I agree that there is cause for concern for why it did not work the first time,focus on the positive.This guy who I had a nice time with wants to go out again. If it is for any of the above reasons that he dropped you the first time, he is not a bad person to go out with again. May you soon find your Shidduch bisha Tova umitzlachas